Great Western Contracting

An ICF Home Builder in Buffalo WY Should Know Where the Wind Comes From Before the First Wall Goes Up.

Your property deserves a builder who plans for Johnson County conditions, not just minimum standards.

  • Licensed, bonded, and insured
  • Authorized Nudura ICF installer and Lester Buildings dealer
  • Award-winning historic preservation craftsmanship
  • Straight answers before any commitment
  • Responds within one business day
CALL TO PLAN YOUR BUFFALO PROJECT

Ready to Build? Let's Talk.

Tell us about your land, your project, and what you want to build. Great Western Contracting will get back to you within one business day.

  Great Western Contracting

An ICF Home Builder in Buffalo WY Should Know Where the Wind Comes From Before the First Wall Goes Up.

Your property deserves a builder who plans for Johnson County conditions, not just minimum standards.

  • Licensed, bonded, and insured
  • Authorized Nudura ICF installer and Lester Buildings dealer
  • Award-winning historic preservation craftsmanship
  • Straight answers before any commitment
  • Responds within one business day

Ready to Build? Let's Talk.

Tell us about your land, your project, and what you want to build. Great Western Contracting will get back to you within one business day.

icf home builder sheridan Wy construction project
Reviewing plans for the ICF home builder Sheridan WY project

Built on Experience. Backed by Results.

Wyoming's Climate Demands More Than a Standard Builder

“The right ICF home builder for Wyoming land is the one who has worked it. Who knows the frost depth, the wind, the fire risk, and what it takes to build something that holds up for decades.”

You are about to make one of the biggest decisions of your life on one of the best pieces of land in the country. The builder you choose will either protect that investment or complicate it. Great Western Contracting has spent 30 years across Northeast Wyoming earning the kind of trust that only comes from doing the work right, telling the truth before the contract is signed, and standing behind every project long after the crew leaves the site.

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30+

Years of Wyoming Construction Experience

  • Family owned and operated, rooted in Sheridan County
  • Award-winning historic preservation craftsmanship
  • Licensed, bonded, and insured
  • Fiduciary mindset: your best outcome, not the highest contract

Building in Buffalo WY Means Planning for a Place That Takes Its Weather Seriously

Buffalo sits at the foot of the Bighorn Mountains where Clear Creek comes off the range and crosses through town. The mountains rise to the west and the open range stretches south toward the Powder River basin. It is country that people choose deliberately, and it asks something of the buildings that stand on it. The wind off the Bighorns is not gentle. The winters drop hard. The land is wide enough that a poorly sited building creates problems that show up every season. As your ICF home builder, we plan every project around those site-specific conditions. We have worked across this corridor long enough to know what Johnson County demands of a structure before the first pour.


Whether you are building a forever home on acreage outside town, coming to Northeastern Wyoming from another state to settle on land you have already chosen, or investing in a property you plan to hold for generations, the planning conversation is where the project is won or lost. As a custom home builder, we start by understanding what you need the building to do, what the site asks of it, and what good looks like for you twenty years from now. We communicate without being chased down, and we deliver what we described in the first conversation.

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    Buffalo is also a town people move to on purpose. Families who want space, quiet, and the kind of open landscape that is genuinely hard to find. People who have visited, fallen for the Bighorn country, and started looking for land. Remote workers who want Wyoming without giving up everything else. Whatever brought you here, working with a home builder who knows this specific place is worth more than a builder who knows Wyoming in general.


LET'S GET STARTED

What Clients Are Saying About Great Western Contracting


Client Testimonial

"Jason helped us with the commercial permitting process and inspections as a design/build commercial contractor. My family was involved in every stage and together, we were able to keep costs down and keep things progressing." 


Rebecca Mancini, Owner of Bino's Corner


Client Testimonial

"I have been around the construction industry more than 50- years. Jason is one of the most knowledgeable people I have met over that time. He is honest, he prices things accordingly, and he is very creative in his design work." 


Dan Keller, Cottage Grove LLC,


Client Testimonial

“We looked at several builders before we found Jason. What stood out right away was that he listened and was completely upfront about what things would cost. He never pushed us toward anything we did not need. The home turned out better than we imagined, and our heating bills are a fraction of what we paid in our old house. We tell everyone we know.”


— Sheridan County homeowner, ICF custom home


"Jason helped us with the commercial permitting process and inspections as a design/build commercial contractor. My family was involved in every stage and together, we were able to keep costs down and keep things progressing." 


Rebecca Mancini, Owner of Bino's Corner


"I have been around the construction industry more than 50- years. Jason is one of the most knowledgeable people I have met over that time. He is honest, he prices things accordingly, and he is very creative in his design work." 


Dan Keller, Cottage Grove LLC,


Core Building Services

Custom concrete home construction sheridan wy

ICF Concrete Homes Built for Buffalo WY Wind and Wyoming Winters

The wind off the Bighorns is one of the first things people notice about Buffalo. It comes down the range with force, especially in winter, and a standard framed wall shows its weaknesses fast when the temperature drops and the wind picks up at the same time. The ICF wall system addresses both. Continuous insulation with no thermal bridging. An airtight envelope that holds temperature when the weather pushes hard against it. A minimum 4-hour fire resistance rating on every exterior wall. As a custom home builder Buffalo WY we help you understand what those specifications mean for your daily comfort and your long-term energy costs before any commitment is made.



An ICF concrete home in Johnson County can be finished in stone, timber accents, board and batten, stucco, or any exterior your design calls for. It can look like a modern ranch home, a traditional Wyoming farmhouse, or something entirely your own. The structure is inside the wall. The character belongs to you. As your ICF home builder Buffalo WY we bring the Nudura system to every custom home project with experience from real Wyoming builds. We also work directly with Wyoming ICF in Ranchester, which gives us product knowledge and material supply reliability that general contractors offering ICF occasionally cannot replicate.


For buyers building in Johnson County with the intention of staying, the ownership picture over decades changes how the upfront cost comparison looks. Lower heating demand through Wyoming winters. A fire-resistant wall assembly that insurance carriers can verify. A structure that holds up through hard use without becoming a maintenance problem. As a concrete home builder Buffalo WY we help you run that comparison honestly before the plans are drawn, so the method you choose fits your land, your life, and your long-term goals.



pole barn builder sheridan wy

Post Frame Builder Buffalo WY: Homes, Shops, and Everything Between

Post frame construction in the Buffalo area is not just for shops and equipment buildings. Some of the most comfortable and well-designed homes on Wyoming acreage are post frame builds. They offer large open floor plans, flexible interior layouts, and the kind of design freedom that lets a home feel genuinely custom without the cost of conventional stick framing. As an authorized Lester Buildings dealer and post frame builder Buffalo WY we plan these projects around how you want to live in them, whether that is a finished home, a working structure, or something that combines both.


A pole barn on Buffalo area land can be a primary residence, a weekend retreat, a rental structure, or a working building, and the planning process should reflect whichever one it is. Living in a pole barn home on Wyoming acreage is a genuinely different experience from a subdivision house, and the people who choose it know exactly why. As a pole barn builder Buffalo WY we walk the property before the layout is set, and we ask about how you plan to live there before we ask about square footage. A building that fits the land and the life is one you never regret building.


A barndominium is a home first. The shop or garage is part of it, but the people living there wake up in bedrooms, cook in kitchens, and raise families in the living space. That part deserves the same attention to comfort, light, layout, and warmth that any custom home gets. As a barndominium builder Buffalo WY we plan the living side of every barndominium with the same care as the working side. Where the natural light comes from. How the mudroom connects to the garage. What the bedroom side sounds like when the shop door opens. These are home decisions, not afterthoughts.


Whether you are building a home, a shop, or both, the planning starts with how you intend to live on that property over the next twenty years. Children grow up. Operations change. What the land asks of the buildings on it shifts over time. As a post frame builder Buffalo WY we think through those future questions with you now, before the layout is locked in. A building planned for the life you are building toward is one that keeps working as that life evolves.



historic restoration sheridan

Building Restoration Contractor Buffalo WY: Preserving What Matters

Buffalo has buildings that carry the history of Johnson County with them. Older ranch structures that have stood through multiple generations. Main Street commercial buildings with original facades worth protecting. Family properties where the character of the building is part of why it matters. As a building restoration contractor Buffalo WY we bring award-winning preservation craftsmanship to projects where getting the details right is as important as getting the work done. We start every restoration project by understanding what the building has before recommending what it needs.



Restoration in Johnson County often means working with buildings that have been through Wyoming weather, deferred maintenance, and repairs done by different hands at different points in time. Some of those repairs were excellent. Others created problems that are still showing up. As a building restoration contractor Buffalo WY we give you an honest picture of scope and cost before any commitment is made.


What can be repaired. What needs to be replaced. What should be protected at all costs. That assessment shapes the project in ways a surface inspection cannot.



general contractor wyoming

General Contractor Buffalo WY: When Your Project Is Bigger Than One Building

Not every project in Johnson County fits neatly into one category. You may need a custom ICF concrete home and a working shop on the same property. You may need a commercial building with a specific concrete floor specification and a post frame structure adjacent to it. You may need site planning before you have decided on the construction method, or design help before the land is fully assessed.


As a general contractor Buffalo WY we bring the full range of our construction capability to those conversations. ICF concrete homes, post frame structures, commercial projects, and restoration work are all within our scope, and we help you figure out how the pieces fit together before any of them are priced individually.


For Johnson County property owners thinking about a multi-phase build, the planning order matters as much as the plan itself. Building the shop before the house changes how the site gets used during construction. Placing the driveway correctly the first time saves excavation cost later. Understanding what utilities need to reach the property before any structure goes up prevents the most expensive surprises. As a general contractor Buffalo WY we think through the whole property before recommending where to start. The goal is a sequence of decisions that makes every phase easier than the one before it.


If you are new to Johnson County and still figuring out what the land asks of a project, that is exactly the right time to have this conversation. Bring the property, the goal, and the questions you have been sitting on. As a general contractor Buffalo WY we give you honest answers about what the project involves, what the realistic cost range looks like, and what the sequence should be before any commitment is made. Use the build cost calculator to get an early range. Then call and we will take it from there.



 ICF Concrete Home Construction in Northeast Wyoming

ICF Concrete Homes Built for Buffalo WY Wind and Wyoming Winters

The wind off the Bighorns is one of the first things people notice about Buffalo. It comes down the range with force, especially in winter, and a standard framed wall shows its weaknesses fast when the temperature drops and the wind picks up at the same time. The ICF wall system addresses both. Continuous insulation with no thermal bridging. An airtight envelope that holds temperature when the weather pushes hard against it. A minimum 4-hour fire resistance rating on every exterior wall. As a custom home builder, we help you understand what those specifications mean for your daily comfort and your long-term energy costs before any commitment is made.


An ICF concrete home in Johnson County can be finished in stone, timber accents, board and batten, stucco, or any exterior your design calls for. It can look like a modern ranch home, a traditional Wyoming farmhouse, or something entirely your own. The structure is inside the wall. The character belongs to you. We bring the  Nudura system to every custom home project with experience from real Wyoming builds. We also work directly with Wyoming ICF in Ranchester, which gives us product knowledge and material supply reliability that general contractors offering ICF occasionally cannot replicate.


For buyers building in Johnson County with the intention of staying, the ownership picture over decades changes how the upfront cost comparison looks. Lower heating demand through Wyoming winters. A fire-resistant wall assembly that insurance carriers can verify. A structure that holds up through hard use without becoming a maintenance problem. Being a concrete home builder serving Buffalo Wyoming we help you run that comparison honestly before the plans are drawn, so the method you choose fits your land, your life, and your long-term goals.


Post frame construction Wyoming

Post Frame Builder: Homes, Shops, and Everything Between

Post frame construction in the Buffalo area is not just for shops and equipment buildings. Some of the most comfortable and well-designed homes on Wyoming acreage are post frame builds. They offer large open floor plans, flexible interior layouts, and the kind of design freedom that lets a home feel genuinely custom without the cost of conventional stick framing. As an authorized Lester Buildings dealer and post frame builder, we plan these projects around how you want to live in them, whether that is a finished home, a working structure, or something that combines both.


A pole barn on Buffalo area land can be a primary residence, a weekend retreat, a rental structure, or a working building, and the planning process should reflect whichever one it is. Living in a pole barn home on Wyoming acreage is a genuinely different experience from a subdivision house, and the people who choose it know exactly why. As a pole barn builder Buffalo WY we walk the property before the layout is set, and we ask about how you plan to live there before we ask about square footage. A building that fits the land and the life is one you never regret building.


A barndominium is a home first. The shop or garage is part of it, but the people living there wake up in bedrooms, cook in kitchens, and raise families in the living space. That part deserves the same attention to comfort, light, layout, and warmth that any custom home gets. As a barndominium builder Buffalo WY we plan the living side of every barndominium with the same care as the working side. Where the natural light comes from. How the mudroom connects to the garage. What the bedroom side sounds like when the shop door opens. These are home decisions, not afterthoughts.


Whether you are building a home, a shop, or both, the planning starts with how you intend to live on that property over the next twenty years. Children grow up. Operations change. What the land asks of the buildings on it shifts over time. As a post frame builder Buffalo WY we think through those future questions with you now, before the layout is locked in. A building planned for the life you are building toward is one that keeps working as that life evolves.


general contracting wyoming

General Contractor Buffalo WY: When Your Project Is Bigger Than One Building

Not every project in Johnson County fits neatly into one category. You may need a custom ICF concrete home and a working shop on the same property. You may need a commercial building with a specific concrete floor specification and a post frame structure adjacent to it. You may need site planning before you have decided on the construction method, or design help before the land is fully assessed. As a general contractor Buffalo WY we bring the full range of our construction capability to those conversations. ICF concrete homes, post frame structures, commercial projects, and restoration work are all within our scope, and we help you figure out how the pieces fit together before any of them are priced individually.


For Johnson County property owners thinking about a multi-phase build, the planning order matters as much as the plan itself. Building the shop before the house changes how the site gets used during construction. Placing the driveway correctly the first time saves excavation cost later. Understanding what utilities need to reach the property before any structure goes up prevents the most expensive surprises. As a general contractor Buffalo WY we think through the whole property before recommending where to start. The goal is a sequence of decisions that makes every phase easier than the one before it.


If you are new to Johnson County and still figuring out what the land asks of a project, that is exactly the right time to have this conversation. Bring the property, the goal, and the questions you have been sitting on. As a general contractor Buffalo WY we give you honest answers about what the project involves, what the realistic cost range looks like, and what the sequence should be before any commitment is made. Use the build cost calculator to get an early range. Then call and we will take it from there.




historic restoration contractor sheridan

Building Restoration Contractor Buffalo WY: Preserving What Matters

Buffalo has buildings that carry the history of Johnson County with them. Older ranch structures that have stood through multiple generations. Main Street commercial buildings with original facades worth protecting. Family properties where the character of the building is part of why it matters. As a building restoration contractor Buffalo WY we bring award-winning preservation craftsmanship to projects where getting the details right is as important as getting the work done. We start every restoration project by understanding what the building has before recommending what it needs.


Restoration in Johnson County often means working with buildings that have been through Wyoming weather, deferred maintenance, and repairs done by different hands at different points in time. Some of those repairs were excellent. Others created problems that are still showing up. As a building restoration contractor Buffalo WY we give you an honest picture of scope and cost before any commitment is made. What can be repaired. What needs to be replaced. What should be protected at all costs. That assessment shapes the project in ways a surface inspection cannot.


Which Building Method Is Right for Your Project?

Choosing the right construction method has real long-term consequences for safety, comfort, energy costs, and insurability on Johnson County land. Wildfire risk in Sheridan County is higher than 92 percent of all U.S. counties according to the U.S. Forest Service. The Bighorn foothills shape the weather differently here than on the open plains, and Clear Creek corridor properties have their own site conditions. Winters drop well below zero. Wind events are part of life across the Powder River Basin. A home planned without those realities in mind starts at a disadvantage from day one. This comparison gives you the information to make the right choice for your land and how long you plan to own it.

Factor Standard Stick Frame ICF Concrete Home Lester Post Frame
Fire Resistance Approx. 45 minutes Minimum 4-hour rated wall, 6-inch concrete core Engineered metal and post system supports fire-conscious design
Wind Resistance Standard code loads Up to 250 mph (Nudura specification) Engineered for open spans and rural site conditions
Insulation Max R-19, thermal bridging through studs R-26+ continuous, no thermal bridging, airtight envelope Insulation packages available for finished and working spaces
Energy Performance Higher heating costs in cold climates 30 to 58 percent reduction in heating and cooling demand Efficient for large buildings when properly insulated
Sound STC 35 to 40, wind and exterior noise audible STC 50+, concrete mass reduces exterior noise significantly Varies by insulation and interior finish
Best Fit Standard residential builds Forever homes, fire-resistant retreats, energy-efficient custom homes Ranch shops, equipment buildings, stables, garages, barndominiums

A forever home buyer building on acreage near Buffalo has different priorities than a rancher who needs a working shop on Johnson County land. An out-of-state buyer focused on fire risk and long-term energy costs may find the ICF concrete wall system is the clearest answer. A rural landowner who needs practical open-span space may find a Lester post frame building is exactly right. Great Western Contracting helps you work through that comparison before any money is committed. If you are weighing options and want to know whether an ICF home is the right fit for your project, that conversation costs nothing. Use the build cost calculator to explore a starting range.

Why Homeowners Choose Great Western Contracting

Straight answers before any commitment

Trusted across Sheridan County and Northeast Wyoming

Authorized Nudura ICF installer and Lester Buildings dealer

Award-winning preservation craftsmanship

Your best interest, not the highest contract

Fast Response.Responds within one business day

Built on Honesty. Backed by 30 Years of Experience.

Clear Creek Country. Johnson County Built.

Johnson County has its own personality and its own demands on the people who build here. Clear Creek runs through Buffalo and the Bighorn Mountains define the western horizon in a way that shapes everything from wind patterns to how a home should be oriented on the land. The Powder River Basin ranching heritage runs south from town and sets a standard for practical, durable construction that has held up through generations. Being a concrete home builder serving this region, we come to every Johnson County project with that same expectation of durability built in from the start. That standard comes from the top of the company and shows up in every decision made on site.


Jason Szewc has been building in Wyoming long enough that his name means something in communities like Buffalo. A Historic Society Award for Preservation. Thirty years of delivering projects honestly across this region. In a town where word travels fast, that reputation has held up. As a home builder serving Johnson County, we bring that same accountability to every project we take on here.


Johnson County ranchers and landowners have been building things that last for generations. We approach every project here with that same expectation. We show up prepared, communicate honestly, and deliver what we describe in the first conversation.

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Site-First Planning

We assess your land, your access, and your site conditions before a single plan is drawn. Your property shapes the project, not the other way around.

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Licensed, Bonded, and Insured

Full documentation ready before work begins. No chasing, no guessing, no surprises on credentials.

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Experienced Team

From design and planning through the final walkthrough, you have a skilled crew with decades of Wyoming construction experience behind every decision on your build.

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Built for Wyoming Conditions

Every project is engineered for the specific snow loads, wind exposure, and frost depth of your site. Wyoming is not a mild climate and we do not build like it is.

Ready to Build? Let's Talk.

Tell us about your land, your project, and what you want to build. Great Western Contracting will get back to you within one business day.

Ready to Build? Let's Talk.

Tell us about your land, your project, and what you want to build. Great Western Contracting will get back to you within one business day.

Ready to Start Your Buffalo Project? Let's Talk.

The planning conversation is where a project gets set up to succeed. Whatever you are building in the Buffalo area, bring your property and your goals. We will tell you honestly what the project involves and what the path forward looks like. Call now to get started.


Bring what you have. Whether it is a custom home, a barndominium project, or something you have not fully figured out yet, this is exactly where the conversation starts.

Frequently Asked Questions About Building in Buffalo WY



See some common questions and answers below, or call us at 307-667-0672

  • What should I know about building a custom home on Johnson County land?

    Johnson County land varies more than most people expect before they have built on it. The foothills west of Buffalo behave differently from open ranch land to the east or south. Wind exposure, soil conditions, drainage, and access can all shift significantly within a few miles. Before a wall system is chosen or a floor plan is drawn, the site needs to be assessed by someone who has worked in this specific region. As a custom home builder serving Buffalo Wyoming, we walk every property before making any recommendations. The conversations that happen on the land before anything else are often the most valuable ones in the whole project.


  • How does an ICF concrete home perform through a Johnson County winter?

    Johnson County winters are serious. The Bighorns push cold air down the range and the wind comes across open ground without much to slow it. A standard framed wall handles those conditions adequately, but adequately is different from well. The ICF wall system seals the building envelope in a way standard framing cannot, and the continuous insulation holds temperature through nights that drop hard without the heating system working constantly to keep up. As a concrete home builder Buffalo WY we have seen the difference firsthand on Wyoming properties. The energy savings, the quiet, and the comfort are not incremental improvements. They are what living in a well-built home on Wyoming land actually feels like.


  • How does the Powder River Basin ranching culture affect how buildings are planned?

    Johnson County has a ranching identity that goes back generations, and the expectations that come with it are specific. Buildings are planned for hard daily use, not for appearance. Equipment access matters more than curb appeal. A structure that slows down the work is a problem regardless of how it looks on the plans. As a home builder and general contractor serving this region, we approach every project by asking how the land is actually used before we talk about what to build on it. That practical orientation reflects how the people here think about their properties, and it shapes every recommendation we make about placement, sizing, and construction method.


  • Can a barndominium work on rural Johnson County acreage?

    Johnson County acreage is one of the better fits for a barndominium in Northeast Wyoming. The lots are large, the lifestyle is oriented around working the land, and the demand for combined living and working space is genuine here rather than a trend. As a barndominium builder, we plan these projects around how the property actually functions. The driveway approach, wind direction, equipment access, living space orientation, and the transition between home and shop are all worked through during the planning stage. That is the planning that makes the building worth living in.


  • What makes a post frame building the right choice for a Johnson County ranch?

    Post frame construction creates large open spans without interior columns, which is exactly what most ranch operations need. Equipment storage that is actually accessible. Work space that does not require maneuvering around structural interference. As a post frame builder Buffalo we configure every building to the specific demands of your site. Snow loads calculated for your location. Post embedment set for your soil conditions. Building orientation planned around the prevailing wind and drainage on your specific piece of ground. The terrain in Johnson County is varied enough that every site deserves its own layout rather than a version of the last one.

  • What should I think about when placing a pole barn on Johnson County land?

    Placement determines how useful the building is for its entire life. The direction the main doors face affects whether you are fighting the wind every time you open them. The distance from the main driveway affects how equipment moves in and out. The drainage around the site determines whether you have a mud situation at the entrance every spring. As a pole barn builder we look at all of those factors before the layout is set. Getting placement right during planning costs nothing extra. Changing it after the posts are in the ground is an entirely different conversation.


  • What does restoration work on an older building in Buffalo typically involve?

    Older buildings in Buffalo often carry more than their age shows on the outside. Framing that has shifted through decades of freeze-thaw cycles. Past repairs done quickly that created problems the original repair never solved. Materials that require sourcing effort to match correctly. As a building restoration contractor serving Buffalo, we prepare you for that honestly before any commitment is made. We start by understanding what the building has, not just what it looks like. That assessment shapes the scope and the cost picture in ways that a walk-around inspection simply cannot. Restoration done right preserves what made the building worth saving. Restoration done carelessly removes it permanently.


Start Planning Your Project Today

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