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Guest house builders in Washington
We specialize in affordable, custom, creative designs for your home, bathrooms, kitchens, finishing basements, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!
"As an account manager at Pro Source Wholesale, I use Troy EVERY time I can. My clients absolutely love him. Top notch service. If I could I would put 100 stars on here!"
Colby T on August 2023
We specialize in affordable, custom, creative designs for your home, bathrooms, kitchens, finishing basements, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!
"As an account manager at Pro Source Wholesale, I use Troy EVERY time I can. My clients absolutely love him. Top notch service. If I could I would put 100 stars on here!"
Colby T on August 2023
Koss Remodeling has been in business for over 10 years. We are locally owned & family operated. Since we started business we’ve completed over 1,000 projects throughout Illinois. We are a 5-star rated company with a proven track record of success. Staying up to date on the newest techniques is important to us which means we are always educating our employees on more efficient ways to complete a project. Our team is qualified to complete any type of remodel, reconstruction, or painting request.
"Micheal and his team was awesome. Very professional and the quality of work is outstanding. Michael was open to listen to what I wanted done, and answered all of the questions that I had. Very easy going guy and great communication. His team, Brandon, Chase, and Rick were also amazing. They showed up when expected, did the job, and cleaned up when done!! Timeframe was met which was amazing because I didn't think it would be possible. But they got it done!! I will be recommending them to all friends and will definitely use them in future!"
Tiffany H on April 2024
Koss Remodeling has been in business for over 10 years. We are locally owned & family operated. Since we started business we’ve completed over 1,000 projects throughout Illinois. We are a 5-star rated company with a proven track record of success. Staying up to date on the newest techniques is important to us which means we are always educating our employees on more efficient ways to complete a project. Our team is qualified to complete any type of remodel, reconstruction, or painting request.
"Micheal and his team was awesome. Very professional and the quality of work is outstanding. Michael was open to listen to what I wanted done, and answered all of the questions that I had. Very easy going guy and great communication. His team, Brandon, Chase, and Rick were also amazing. They showed up when expected, did the job, and cleaned up when done!! Timeframe was met which was amazing because I didn't think it would be possible. But they got it done!! I will be recommending them to all friends and will definitely use them in future!"
Tiffany H on April 2024
We have 45 years of construction experience. We do everything from decks to new residential construction.
"Went very well. Gave them a key and they worked while we where away for a few days. They were looking for a leak issue. They found and fixed. Also did a few other smaller items and replaced damaged drywall ceiling. (finished and primed) All was documented with pictures and they kept me informed. Came home to a job well done. Thrilled that problem is gone. Will definitely have them back!"
Kim F on July 2024
We have 45 years of construction experience. We do everything from decks to new residential construction.
"Went very well. Gave them a key and they worked while we where away for a few days. They were looking for a leak issue. They found and fixed. Also did a few other smaller items and replaced damaged drywall ceiling. (finished and primed) All was documented with pictures and they kept me informed. Came home to a job well done. Thrilled that problem is gone. Will definitely have them back!"
Kim F on July 2024
We offer quality and affordable general contracting services. Turn your dream into a masterpiece
"Everything went great and was done very quickly. Will definitely hire again."
Delton M on January 2025
We offer quality and affordable general contracting services. Turn your dream into a masterpiece
"Everything went great and was done very quickly. Will definitely hire again."
Delton M on January 2025
United Freight of America is your all inclusive transport solution. CONTACT US FOR A QUOTE. please include pick up and Drop off locations and vehicle information
"Excellent, no problems. My car was new the first year I used the service and there has never been any damage during the transports. The men picking up and delivering the car have always been pleasant and cooperative. Both Ely and Guy at United Transport has been highly responsive to my needs. I would highly recommend this company."
CLAUDIA H on October 2021
United Freight of America is your all inclusive transport solution. CONTACT US FOR A QUOTE. please include pick up and Drop off locations and vehicle information
"Excellent, no problems. My car was new the first year I used the service and there has never been any damage during the transports. The men picking up and delivering the car have always been pleasant and cooperative. Both Ely and Guy at United Transport has been highly responsive to my needs. I would highly recommend this company."
CLAUDIA H on October 2021
Family owned and operated
Family owned and operated
Affordable home and business building and restorations from A-Z
Affordable home and business building and restorations from A-Z
Doug Williams Construction has been serving Central Illinois for many years. With years of experience and a full range of services for your small and large projects, Doug Williams Construction can design and build anything you want for your home. Some of our services include: *New Construction *Custom Remodeling *Room Additions *Garages *Roofing, *Siding, *Windows *Doors *Kitchens *Bathroom Remodeling *Insurance Restoration - Storm and Fire Damage *Custom Basement Finishing *Computer Aided Design Work Call Doug Williams Construction today for more information!
Doug Williams Construction has been serving Central Illinois for many years. With years of experience and a full range of services for your small and large projects, Doug Williams Construction can design and build anything you want for your home. Some of our services include: *New Construction *Custom Remodeling *Room Additions *Garages *Roofing, *Siding, *Windows *Doors *Kitchens *Bathroom Remodeling *Insurance Restoration - Storm and Fire Damage *Custom Basement Finishing *Computer Aided Design Work Call Doug Williams Construction today for more information!
We are a full service heating, air conditioning and plumbing company. We can also remodel your bathroom. We also do insulation and energy audits. We have an infrared camera to help find air leaks in your house. We are geothermal specialists, and do our own drilling of the geothermal wells. We also bore in water lines and repair broken sewer lines.
We are a full service heating, air conditioning and plumbing company. We can also remodel your bathroom. We also do insulation and energy audits. We have an infrared camera to help find air leaks in your house. We are geothermal specialists, and do our own drilling of the geothermal wells. We also bore in water lines and repair broken sewer lines.
General Contractor
General Contractor
Guest house building services FAQs
In most states, yes—you can build a guest house, but every city or county sets its own zoning rules and building codes. Before breaking ground, check local ordinances, confirm lot setbacks, and secure the right permits. A local contractor or design-build firm can walk you through the paperwork and site requirements so your project starts on solid legal footing.
Yes—homeowners often tap a few different financing tools. A home-equity line of credit (HELOC) lets you borrow against your equity as you need funds. If you prefer a lump sum tied directly to the project, a short-term construction loan can roll into a second mortgage once the build is complete. Cash-out refinancing is another option: you replace your current mortgage with a larger one and use the difference to cover construction costs.
When you build a guest house, you’re creating a separate structure for hosting visitors without the full amenities needed for permanent living. An accessory dwelling unit, however, includes a complete kitchen and bathroom, meeting building codes for a long-term residence. This key difference makes an ADU ideal for long-term occupancy or rental income, adding enduring value to your property.
How many rooms you need depends on how you plan to use the space. Aim for one bedroom per every one or two occupants to make sure everyone has enough privacy and comfort. Added living and dining areas give you extra functionality, especially for rental use or long-term stays.
Most homeowners pick somewhere between 600 and 1,500 square feet to fit all the essentials. Make sure your design supports one to two occupants per bedroom and includes enough common areas for comfortable daily living. A well-proportioned layout boosts both functionality and property value.
No—a guest house isn’t just a bump-out on your main home. A bump-out is a small extension within an existing room for extra seating or storage. In contrast, you build a guest house as a standalone building with its own foundation and amenities, giving you a fully separate living area that can boost your property’s versatility and value.
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