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Find Addition to existing structure builders in Triangle

TWF Construction

4.56(
50
)
Approved Pro

TWF Construction

4.56(
50
)
Approved Pro
Super Service Award
Customers say: True professional
192 local quotes requested
29 years of experience

Troy is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"Troy from TWF Construction came this afternoon to fix our toilet. It needed new wax ring and new screws and bolts. Friendly, efficient, and cleaned up the work area. Would recommend TWF Construction. Thank you for making it easy to get our toilet fixed."

Shirley W on January 2026

Troy is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"Troy from TWF Construction came this afternoon to fix our toilet. It needed new wax ring and new screws and bolts. Friendly, efficient, and cleaned up the work area. Would recommend TWF Construction. Thank you for making it easy to get our toilet fixed."

Shirley W on January 2026


Moses Housing LLC

4.94(
8
)
Approved Pro

Moses Housing LLC

4.94(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"They replaced my beaten wooden deck with a new composite one. The price was more than fair after shopping around. What I liked from the experience was the cleanliness and speed. Everything we agreed on they did in timely manner."

Charlie H on October 2023

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"They replaced my beaten wooden deck with a new composite one. The price was more than fair after shopping around. What I liked from the experience was the cleanliness and speed. Everything we agreed on they did in timely manner."

Charlie H on October 2023


Avatar for Eco Power Works

Eco Power Works

5.00(
4
)
Approved Pro

Eco Power Works

5.00(
4
)
Approved Pro
20 years of experience
Free onsite estimate

A leading construction company in Northern VA focuses on providing optimum quality in various construction services. We take great pride in our work as we have during our 20+ years in business. Thus, you can rest assured, that no matter what construction project we handle, we will be giving nothing but highly professional and expert works. Our galleries collections of photos from previous construction projects can attest to the amount of time, thought, and effort that we put into the services we provide.

"Eco Power Works did a great job on my kitchen and bathroom renovation ! Daryl and John were very patient listening to my ideas. They brought in an architect who was reasonably priced and made suggestions to overall designs which I am so glad they did ! The project from Start to finish was on schedule which O was pleasantly surprised - these guys kept their words and their workers were always on time respectful of my property and time. I like that they always checked with me when they took major steps to double check that everyone was on the same page - they communicated every step of the way and were very careful to to do the job right. I really love the beautiful cabinets and marble countertops which were my dreams. I am so glad I hired these guys - they really did a great job overall - will definitely recommend them to my friends and neighbors !"

Jane _ on April 2025

A leading construction company in Northern VA focuses on providing optimum quality in various construction services. We take great pride in our work as we have during our 20+ years in business. Thus, you can rest assured, that no matter what construction project we handle, we will be giving nothing but highly professional and expert works. Our galleries collections of photos from previous construction projects can attest to the amount of time, thought, and effort that we put into the services we provide.

"Eco Power Works did a great job on my kitchen and bathroom renovation ! Daryl and John were very patient listening to my ideas. They brought in an architect who was reasonably priced and made suggestions to overall designs which I am so glad they did ! The project from Start to finish was on schedule which O was pleasantly surprised - these guys kept their words and their workers were always on time respectful of my property and time. I like that they always checked with me when they took major steps to double check that everyone was on the same page - they communicated every step of the way and were very careful to to do the job right. I really love the beautiful cabinets and marble countertops which were my dreams. I am so glad I hired these guys - they really did a great job overall - will definitely recommend them to my friends and neighbors !"

Jane _ on April 2025


HW Mechanical and Remodeling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

HW Mechanical and Remodeling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
16 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


Avatar for Best Homes LLC.

Best Homes LLC.

4.94(
17
)
Approved Pro

Best Homes LLC.

4.94(
17
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
79 local quotes requested

Here at Best Homes, our company is based on the belief that our customers' satisfaction is of the utmost importance. Our team is driven to meet your needs with professionalism, creativity, and efficiency. Established 2005. Owner: Jonathan Perez Office Manager: Paige Marie Campbell Project Manager: Jefry Perez

"Best Homes LLC just finished our basement and we could not be happier! The quality of work is outstanding and the team was always on time, happy to be here and great at communicating. Jefry is a great project manager and always takes your input regarding placement of different aspects and fixtures. It was a lot of fun working through picking out different tiles, flooring, cabinets, colors, etc to make the space how we envisioned it. We even got to choose the placement of extra outlets and things to make the space fit for our use. The price was very reasonable, especially after being quoted nearly double from another contractor. Our basement turned out absolutely gorgeous and now we have a functional, finished space with a full bathroom and wet bar included. The team was incredibly accommodating, gave a generous allowance for tile and flooring, etc. The project was finished with the quoted price and on time, and we will use Best Homes LLC as our go-to for any contracting needs. 10/10!"

Bradly B on November 2025

Here at Best Homes, our company is based on the belief that our customers' satisfaction is of the utmost importance. Our team is driven to meet your needs with professionalism, creativity, and efficiency. Established 2005. Owner: Jonathan Perez Office Manager: Paige Marie Campbell Project Manager: Jefry Perez

"Best Homes LLC just finished our basement and we could not be happier! The quality of work is outstanding and the team was always on time, happy to be here and great at communicating. Jefry is a great project manager and always takes your input regarding placement of different aspects and fixtures. It was a lot of fun working through picking out different tiles, flooring, cabinets, colors, etc to make the space how we envisioned it. We even got to choose the placement of extra outlets and things to make the space fit for our use. The price was very reasonable, especially after being quoted nearly double from another contractor. Our basement turned out absolutely gorgeous and now we have a functional, finished space with a full bathroom and wet bar included. The team was incredibly accommodating, gave a generous allowance for tile and flooring, etc. The project was finished with the quoted price and on time, and we will use Best Homes LLC as our go-to for any contracting needs. 10/10!"

Bradly B on November 2025


Avatar for Alltecs, LLC

Alltecs, LLC

3.91(
16
)
Approved Pro

Alltecs, LLC

3.91(
16
)
Approved Pro
Customers say: Terrific value
10 local quotes requested
11 years of experience

At Alltecs, we are a leading minority-owned construction firm dedicated to delivering exceptional residential and commercial construction services throughout the DC area. With a strong commitment to professionalism, integrity, quality, and service, we have established ourselves as a trusted name in the industry. Our company was founded with a vision to provide top-notch construction solutions that exceed our clients' expectations. We understand that every project is unique, and our team of skilled professionals brings a wealth of expertise and experience to every endeavor. From concept to completion, we strive for excellence and ensure that each project is executed with meticulous attention to detail.

"Alltecs has completed several projects for our local government municipality, including a public park restroom renovation, an office conversion, and various electrical and plumbing remodels. The team was efficient, professional, and communicative throughout each project. They quickly became a go-to contractor for work completed on time and with excellent quality. Highly recommended for anyone seeking a reliable and skilled contractor with experience working on government projects."

Alicia H on October 2025

At Alltecs, we are a leading minority-owned construction firm dedicated to delivering exceptional residential and commercial construction services throughout the DC area. With a strong commitment to professionalism, integrity, quality, and service, we have established ourselves as a trusted name in the industry. Our company was founded with a vision to provide top-notch construction solutions that exceed our clients' expectations. We understand that every project is unique, and our team of skilled professionals brings a wealth of expertise and experience to every endeavor. From concept to completion, we strive for excellence and ensure that each project is executed with meticulous attention to detail.

"Alltecs has completed several projects for our local government municipality, including a public park restroom renovation, an office conversion, and various electrical and plumbing remodels. The team was efficient, professional, and communicative throughout each project. They quickly became a go-to contractor for work completed on time and with excellent quality. Highly recommended for anyone seeking a reliable and skilled contractor with experience working on government projects."

Alicia H on October 2025


Avatar for District Renovations LLC

District Renovations LLC

4.78(
16
)
Approved Pro

District Renovations LLC

4.78(
16
)
Approved Pro
Super Service Award
Customers say: Terrific value
36 local quotes requested
16 years of experience

Here at District Renovations LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"I recently worked with District Renovations and had a fantastic experience. Alex, the owner, was incredibly easy to work with?always professional, responsive, and timely in addressing all my requests and questions. He made the renovation process smooth and stress-free, and the quality of work delivered was excellent. It?s clear that he takes pride in his work and values customer satisfaction. I?d gladly recommend District Renovations to anyone looking for a reliable and trustworthy contractor."

Nick R on August 2025

Here at District Renovations LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"I recently worked with District Renovations and had a fantastic experience. Alex, the owner, was incredibly easy to work with?always professional, responsive, and timely in addressing all my requests and questions. He made the renovation process smooth and stress-free, and the quality of work delivered was excellent. It?s clear that he takes pride in his work and values customer satisfaction. I?d gladly recommend District Renovations to anyone looking for a reliable and trustworthy contractor."

Nick R on August 2025


Avatar for Home Equity Contractors

Home Equity Contractors

4.70(
27
)
Approved Pro

Home Equity Contractors

4.70(
27
)
Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
82 local quotes requested

Free Estimates. We understand how stressful and expensive home improvements can be from choosing the right contractor for the job to having your house in disarray for a period of time. If you are updating your home to put on the market, we offer a deferred payment option. We recognize the struggle that sellers face when getting ready to sell their home. Often the main issue is simply not having the finances to make the necessary improvements that will generate a higher sales price. For some it is simply understanding that today's buyers want move in ready homes. ​HEC was started to give sellers and their agents the ability to sell their home quickly and at the highest price possible. There is no secret to selling, UPDATED HOMES SELL FASTER AND HIGHER! Our clients have averaged a 130% Return on Investment when updating their home for sale. We can take care of all of your home remodeling needs from finishing a basement, remodeling your kitchen and bathrooms, to replacing your roof. ​Our approach is simple - we use high quality contractors to make smart updates to your home or listing based on our 20 years of experience in the DC Area Real Estate Market. We do not recommend high end upgrades if they will not generate a good return on your investment. We work with you or your agent to establish an expected price after updates to make an informed decision. The owners of Home Equity Contractors are licensed Realtors in VA, MD, and DC.

"If you want to work with someone condescending, rude, confrontational, unprofessional, and whose contractors workmanship is probably the worst I have ever encountered in my 30 years of working with contractors, THIS IS YOUR GUY. I can ramble on about the false promises, the horrible workmanship, the constant delays, the lack of communication, the rude and confrontational text messages. I guarantee Mr. Shank will in fact respond to this review and try to flip the script and blame it all on me somehow. He talks very poorly about all his customers well at least the ones he doesn't like. Not sure what that is based on although I do have some idea what is based on. But he never made anything explicit, so I can't make accusations that he is a racist. So I am definitely not saying he is a racist because he didn't do anything racist. But if he was a racist it would explain why he didn't give two poops about doing good work for multiple projects I provided him. I also have multiple properties and was hoping to make Mr. Shank a lifelong contractor. In a nutshell, he has done 2 projects for me at 2 properties. One was installing a threshold for a glass enclosed shower stall. His crappy sub contractor (they are not employees) despite him saying they are employees, did not install any grouting on the threshold. Fast forward 1 year, and mold is popping up all around the threshold. Rather than dealing with this individual, I hired another contractor to fix up his mess. Second job, and my second mistake, I hired him for a full scale home renovation for around 50K. That project was an absolute disaster. He took 3 months to do what he promised to me verbally would be a 3 week job. I don't really want to spend 1 hour writing down all the crap he did wrong. I'll try so sum up the highlights. Ripped out old flooring, promised to make new flooring level after installing new concrete by using lasers. New flooring is totally not level and as bumpy as walking on your local trail. The shoe moldings around the flooring look like a child installed them. I had to argue with him to get him to regrout the bathroom which was in his contract in the first place. I can go on and on. For sure if you are someone that Mr. Shank likes and match his criteria of what he likes, whatever that could be I have no idea definitely not race related. He may do a great job for you and that may explain the great reviews. I myself had a horrible experience with Mr. Shank and his group of sub contractors who just plain do terrible work. Ignore my review or take it seriously, frankly this guy will keep getting business cause he's a great salesman. Even has a LinkedIN profile to show how professional he is. Epic scammer and fraud. Stay away."

Kevin D on June 2025

Free Estimates. We understand how stressful and expensive home improvements can be from choosing the right contractor for the job to having your house in disarray for a period of time. If you are updating your home to put on the market, we offer a deferred payment option. We recognize the struggle that sellers face when getting ready to sell their home. Often the main issue is simply not having the finances to make the necessary improvements that will generate a higher sales price. For some it is simply understanding that today's buyers want move in ready homes. ​HEC was started to give sellers and their agents the ability to sell their home quickly and at the highest price possible. There is no secret to selling, UPDATED HOMES SELL FASTER AND HIGHER! Our clients have averaged a 130% Return on Investment when updating their home for sale. We can take care of all of your home remodeling needs from finishing a basement, remodeling your kitchen and bathrooms, to replacing your roof. ​Our approach is simple - we use high quality contractors to make smart updates to your home or listing based on our 20 years of experience in the DC Area Real Estate Market. We do not recommend high end upgrades if they will not generate a good return on your investment. We work with you or your agent to establish an expected price after updates to make an informed decision. The owners of Home Equity Contractors are licensed Realtors in VA, MD, and DC.

"If you want to work with someone condescending, rude, confrontational, unprofessional, and whose contractors workmanship is probably the worst I have ever encountered in my 30 years of working with contractors, THIS IS YOUR GUY. I can ramble on about the false promises, the horrible workmanship, the constant delays, the lack of communication, the rude and confrontational text messages. I guarantee Mr. Shank will in fact respond to this review and try to flip the script and blame it all on me somehow. He talks very poorly about all his customers well at least the ones he doesn't like. Not sure what that is based on although I do have some idea what is based on. But he never made anything explicit, so I can't make accusations that he is a racist. So I am definitely not saying he is a racist because he didn't do anything racist. But if he was a racist it would explain why he didn't give two poops about doing good work for multiple projects I provided him. I also have multiple properties and was hoping to make Mr. Shank a lifelong contractor. In a nutshell, he has done 2 projects for me at 2 properties. One was installing a threshold for a glass enclosed shower stall. His crappy sub contractor (they are not employees) despite him saying they are employees, did not install any grouting on the threshold. Fast forward 1 year, and mold is popping up all around the threshold. Rather than dealing with this individual, I hired another contractor to fix up his mess. Second job, and my second mistake, I hired him for a full scale home renovation for around 50K. That project was an absolute disaster. He took 3 months to do what he promised to me verbally would be a 3 week job. I don't really want to spend 1 hour writing down all the crap he did wrong. I'll try so sum up the highlights. Ripped out old flooring, promised to make new flooring level after installing new concrete by using lasers. New flooring is totally not level and as bumpy as walking on your local trail. The shoe moldings around the flooring look like a child installed them. I had to argue with him to get him to regrout the bathroom which was in his contract in the first place. I can go on and on. For sure if you are someone that Mr. Shank likes and match his criteria of what he likes, whatever that could be I have no idea definitely not race related. He may do a great job for you and that may explain the great reviews. I myself had a horrible experience with Mr. Shank and his group of sub contractors who just plain do terrible work. Ignore my review or take it seriously, frankly this guy will keep getting business cause he's a great salesman. Even has a LinkedIN profile to show how professional he is. Epic scammer and fraud. Stay away."

Kevin D on June 2025


"Great job. Finished on-time and within budget."

Dennis W on October 2024

Before & After Home Improvement Co. is a residential contracting company serving the Prince William County, VA area. Contact us today for expert advice on your next project. We offer only the best quality services and products. Additional email - rickfish108@aol.com.

"Great job. Finished on-time and within budget."

Dennis W on October 2024


Avatar for Thomas Custom Builders Inc

Thomas Custom Builders Inc

4.85(
74
)
Approved Pro

Thomas Custom Builders Inc

4.85(
74
)
Approved Pro
Customers say: Quality work
42 local quotes requested
22 years of experience

Whether you want to remodel your existing home or build a brand new one, Thomas Custom Builders can help. Our 70+ years of combined experience as Northern Virginia general contractors and our commitment to quality ensures your custom construction or design-build project will be a success. Be it a master suite, custom kitchen or home addition, we dig deep to learn what’s making you spend your time and resources on this particular project. We honestly discuss the costs associated with your goals, then we deliver what we do best: excellence in custom remodeling. The only thing that counts is finishing your job exactly the way you want it. No compromise.

"Thomas Custom Builders: Meticulous, Punctual, and Truly Transformative! We wholeheartedly and enthusiastically recommend Thomas Custom Builders (TCB). We had a vision for transforming our 40-year-old home, and TCB didn't just execute it—they transformed it into an amazing, dream-like space that we never want to leave. We will scream their praises from the rooftops! The entire process, from start to finish, was meticulous. Our initial discussions with Troy were detailed and thoughtful. As the project progressed, principals Dave and Rick were incredibly thorough, setting our minds at ease with any concerns or reservations we may have had about the construction process. TCB’s commitment to professionalism and transparency was outstanding. We had online access to the daily schedule, and our primary contacts, Project Manager Brian Smith and Site Manager Dan, were absolute professionals. They were patient, understanding, and very accommodating to our questions and needs throughout the build. What impressed us most was their integrity and commitment to their word. They were "straight shooters," never overpromising and approaching their work with the utmost professionalism and care. They said the project would take three months, and it was completed on schedule in three months. The only thing late was our duty to write this glowing review. If you are looking for a builder committed to quality, punctuality, and transparency, look no further than Thomas Custom Builders. They are the definition of professionalism."

Ruby D on December 2025

Whether you want to remodel your existing home or build a brand new one, Thomas Custom Builders can help. Our 70+ years of combined experience as Northern Virginia general contractors and our commitment to quality ensures your custom construction or design-build project will be a success. Be it a master suite, custom kitchen or home addition, we dig deep to learn what’s making you spend your time and resources on this particular project. We honestly discuss the costs associated with your goals, then we deliver what we do best: excellence in custom remodeling. The only thing that counts is finishing your job exactly the way you want it. No compromise.

"Thomas Custom Builders: Meticulous, Punctual, and Truly Transformative! We wholeheartedly and enthusiastically recommend Thomas Custom Builders (TCB). We had a vision for transforming our 40-year-old home, and TCB didn't just execute it—they transformed it into an amazing, dream-like space that we never want to leave. We will scream their praises from the rooftops! The entire process, from start to finish, was meticulous. Our initial discussions with Troy were detailed and thoughtful. As the project progressed, principals Dave and Rick were incredibly thorough, setting our minds at ease with any concerns or reservations we may have had about the construction process. TCB’s commitment to professionalism and transparency was outstanding. We had online access to the daily schedule, and our primary contacts, Project Manager Brian Smith and Site Manager Dan, were absolute professionals. They were patient, understanding, and very accommodating to our questions and needs throughout the build. What impressed us most was their integrity and commitment to their word. They were "straight shooters," never overpromising and approaching their work with the utmost professionalism and care. They said the project would take three months, and it was completed on schedule in three months. The only thing late was our duty to write this glowing review. If you are looking for a builder committed to quality, punctuality, and transparency, look no further than Thomas Custom Builders. They are the definition of professionalism."

Ruby D on December 2025

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FAQs for addition to existing structure building service projects in Triangle, VA

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Triangle, VA homeowners’ guide to addition to existing structure building services

From average costs to expert advice, get all the answers you need to get your job done.