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Find Addition to existing structure builders in Washington DC

Avatar for ACS Construction

ACS Construction

5.00(
4
)
Approved Pro

ACS Construction

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
26 years of experience

Trust ACS Construction in Washington DC NW. to handle all your new construction and remodeling projects. We have earned a reputation for excellence, thanks to our dedicated team of employees and associates, as well as our huge network of vendors. Despite the high level of competition in the industry , we have managed to rise above and deliver first-rate services every time. We are not only HomeAdvisor members, but you can also find us on BBB, Houzz, NARI, NKBA. More than just arriving at your location on time, we also make it a point to finish the job before the deadline. We will even extend hours if the situation calls for it. Unlike other companies, we thoroughly explain the entire process so you know what is happening. We will constantly update you with the status of completion and will not impose something that you do not need.

"I hired German to renovate our basement (utility room, laundry room, storage...), including a complete overhaul of plumbing and wiring. I was extremely pleased with the quality of work, the organization of various activities, the price asked and the follow-up. By employing skilled and efficient workers licensed for plumbing (water and gas), electrical and carpentry/drywall the coordination of the various trades was limited to the strict minimum. I would not hesitate to recommend German for similar renovation/extension projects."

Alain L on October 2023

Trust ACS Construction in Washington DC NW. to handle all your new construction and remodeling projects. We have earned a reputation for excellence, thanks to our dedicated team of employees and associates, as well as our huge network of vendors. Despite the high level of competition in the industry , we have managed to rise above and deliver first-rate services every time. We are not only HomeAdvisor members, but you can also find us on BBB, Houzz, NARI, NKBA. More than just arriving at your location on time, we also make it a point to finish the job before the deadline. We will even extend hours if the situation calls for it. Unlike other companies, we thoroughly explain the entire process so you know what is happening. We will constantly update you with the status of completion and will not impose something that you do not need.

"I hired German to renovate our basement (utility room, laundry room, storage...), including a complete overhaul of plumbing and wiring. I was extremely pleased with the quality of work, the organization of various activities, the price asked and the follow-up. By employing skilled and efficient workers licensed for plumbing (water and gas), electrical and carpentry/drywall the coordination of the various trades was limited to the strict minimum. I would not hesitate to recommend German for similar renovation/extension projects."

Alain L on October 2023


Avatar for CHEVY CHASE REMODELING

CHEVY CHASE REMODELING

4.77(
170
)
Approved Pro

CHEVY CHASE REMODELING

4.77(
170
)
Approved Pro
Customers say: Terrific value
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
14 local quotes requested

26 employees. Cost is determined by the job. Travel charges may apply. Service fee applies. Extra charge for after-hours service. License #: 95598. Additional contact: jennifer depollar. Additional phone #: (240)535-6296. Additional service areas: calvert county & district of columbia. Additional services offered: siding, roofing, windows, kitchens, baths, flooring,painting. We work under the rowan group llc's licensing in Virginia and D.C.

"I wish I could give ten stars. Came home from Christmas to a literal waterfall in my house. Steven and his crew were absolutely the best team I could have asked for. Understanding, communicative, empathetic and on top of all that, the quality of their work is EXCELLENT. My entire first floor was taken down to studs and rebuilt and it's better than it was before the disaster."

Jen K on October 2025

26 employees. Cost is determined by the job. Travel charges may apply. Service fee applies. Extra charge for after-hours service. License #: 95598. Additional contact: jennifer depollar. Additional phone #: (240)535-6296. Additional service areas: calvert county & district of columbia. Additional services offered: siding, roofing, windows, kitchens, baths, flooring,painting. We work under the rowan group llc's licensing in Virginia and D.C.

"I wish I could give ten stars. Came home from Christmas to a literal waterfall in my house. Steven and his crew were absolutely the best team I could have asked for. Understanding, communicative, empathetic and on top of all that, the quality of their work is EXCELLENT. My entire first floor was taken down to studs and rebuilt and it's better than it was before the disaster."

Jen K on October 2025


Avatar for Two Brothers Handyman and Home Improvement Service, LLC

Two Brothers Handyman and Home Improvement Service, LLC

4.96(
76
)
Approved Pro

Two Brothers Handyman and Home Improvement Service, LLC

4.96(
76
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

Two Brothers Handyman and Home Improvement Service has 20+ years experience and a "CLASS A LICENSE IN VA & DC". We love every type of project from large scale renovations to even the smallest of jobs! We specialize in quality workmanship at affordable prices. We take pride in maintaining a consistently high-caliber level of work that comes with a satisfaction guarantee. Open and honest lines of communication with our clients during every step of the project is key to building relationships with successful outcomes. Washington DC License #2705168243, Expiration 5/31/2020.

"Ruben and his team were excellent from the beginning of our bathroom renovation to the end. Ruben provided a thorough consultation at our home, let us know about the timeline, and worked with us to ensure we had the materials we needed (we procured some we wanted to pick out and we procured others that we needed help with). He provided good recommendations during the project, kept us updated, and ultimately finished the project within the timeframe he gave. We were really happy with the quality of the finished bathroom and we would definitely recommend Two Brothers."

Carlin L on January 2026

Two Brothers Handyman and Home Improvement Service has 20+ years experience and a "CLASS A LICENSE IN VA & DC". We love every type of project from large scale renovations to even the smallest of jobs! We specialize in quality workmanship at affordable prices. We take pride in maintaining a consistently high-caliber level of work that comes with a satisfaction guarantee. Open and honest lines of communication with our clients during every step of the project is key to building relationships with successful outcomes. Washington DC License #2705168243, Expiration 5/31/2020.

"Ruben and his team were excellent from the beginning of our bathroom renovation to the end. Ruben provided a thorough consultation at our home, let us know about the timeline, and worked with us to ensure we had the materials we needed (we procured some we wanted to pick out and we procured others that we needed help with). He provided good recommendations during the project, kept us updated, and ultimately finished the project within the timeframe he gave. We were really happy with the quality of the finished bathroom and we would definitely recommend Two Brothers."

Carlin L on January 2026


Avatar for Banks & Son-Builders

Banks & Son-Builders

4.55(
33
)
Approved Pro

Banks & Son-Builders

4.55(
33
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
8 years of experience

We are a family owned business operating over 40 years in the DMV area, primarily in Washington, D.C. and Montgomery County.  We are BUILDERS, not handymen.  In addition to our Maryland and Washington, D.C. Home Improvement Licenses, we are licensed Maryland Home Builders.  Over the years we've built dozens of CUSTOM homes, start to finish, that are still loved and lived in by their homeowners today!  Although we are a small firm, our scope of work is large.

"Sam Banks Jr will charm you and give you a very fair quote- it might even seem like a steal. Don?t take it. We hired Banks and Son to redo our shower and the lack of attention to detail was atrocious. The final product was sloppy, there were cracked tiles left on the wall, our shower door was installed slanted leaving a large gap at the bottom, the grout was cracked, there was a divot in the floor where water pooled, and there were parts of the shower that were left unsealed. When I emailed Sam about these issues, he was aggressive, misogynistic, and dismissive. He gave excuses and blamed me. Even after he reluctantly fixed everything but the floor- we had another contractor clean up his mess. I would not recommend, his ego is the size of Mars, he?s aggressive towards women, and clearly lacks pride in his services "

Carly H on December 2025

We are a family owned business operating over 40 years in the DMV area, primarily in Washington, D.C. and Montgomery County.  We are BUILDERS, not handymen.  In addition to our Maryland and Washington, D.C. Home Improvement Licenses, we are licensed Maryland Home Builders.  Over the years we've built dozens of CUSTOM homes, start to finish, that are still loved and lived in by their homeowners today!  Although we are a small firm, our scope of work is large.

"Sam Banks Jr will charm you and give you a very fair quote- it might even seem like a steal. Don?t take it. We hired Banks and Son to redo our shower and the lack of attention to detail was atrocious. The final product was sloppy, there were cracked tiles left on the wall, our shower door was installed slanted leaving a large gap at the bottom, the grout was cracked, there was a divot in the floor where water pooled, and there were parts of the shower that were left unsealed. When I emailed Sam about these issues, he was aggressive, misogynistic, and dismissive. He gave excuses and blamed me. Even after he reluctantly fixed everything but the floor- we had another contractor clean up his mess. I would not recommend, his ego is the size of Mars, he?s aggressive towards women, and clearly lacks pride in his services "

Carly H on December 2025


Avatar for NV Design & Build

NV Design & Build

5.00(
6
)
Approved Pro

NV Design & Build

5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
30 years of experience

We are a full-service, licensed, and bonded design-build company that provides superior home design and remodeling services for basements, addition, custom new home and all residential renovation needs in VA, DC & MD and surrounding areas. With our integrated home renovation design-build approach, everything is under control for your project – from design to material procurement, project management to construction – so that your home renovation process is smooth and efficient. Our expertise includes everything from additions, new construction design and build, bathrooms, kitchens, and basements to full home renovations and anything in-between. We pride ourselves on our high-end designs, quality of construction, and most importantly, our client satisfaction.

"Everything went great. This is definitely a big addition for me."

Dayana W on May 2023

We are a full-service, licensed, and bonded design-build company that provides superior home design and remodeling services for basements, addition, custom new home and all residential renovation needs in VA, DC & MD and surrounding areas. With our integrated home renovation design-build approach, everything is under control for your project – from design to material procurement, project management to construction – so that your home renovation process is smooth and efficient. Our expertise includes everything from additions, new construction design and build, bathrooms, kitchens, and basements to full home renovations and anything in-between. We pride ourselves on our high-end designs, quality of construction, and most importantly, our client satisfaction.

"Everything went great. This is definitely a big addition for me."

Dayana W on May 2023


Avatar for JW Home Improvement

JW Home Improvement

4.64(
4,796
)
Approved Pro

JW Home Improvement

4.64(
4,796
)
Approved Pro
Customers say: Super punctual
474 local quotes requested
25 years of experience

JWHI provides world-class customer service with consistent and superior workmanship. We strive to be the trusted market leader in the home improvement industry. Proudly, we are Super Service Award Winner for over a decade, and we plan to keep that streak going! Contact us today to discuss your next handyman or remodeling project. Our mission is to provide you with a happy home improvement experience!

"I just warn other people about their scam like business tactic. They added up overhead charge (8% of labor cost) and whatever material they used to finish the job. So an upfront estimate they give you is only labor cost. Be careful before you hire."

kyong P on December 2025

JWHI provides world-class customer service with consistent and superior workmanship. We strive to be the trusted market leader in the home improvement industry. Proudly, we are Super Service Award Winner for over a decade, and we plan to keep that streak going! Contact us today to discuss your next handyman or remodeling project. Our mission is to provide you with a happy home improvement experience!

"I just warn other people about their scam like business tactic. They added up overhead charge (8% of labor cost) and whatever material they used to finish the job. So an upfront estimate they give you is only labor cost. Be careful before you hire."

kyong P on December 2025


Avatar for 3DF, LLC

3DF, LLC

4.63(
8
)
Approved Pro

3DF, LLC

4.63(
8
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
41 years of experience

3DF LLC is a locally owned and operated company serving the Reston, VA area and surrounding communities. 3DF, LLC is a full service design & builder of your dream home and living environment. We can help expand your existing structure for you and your family to enjoy for years. Professional craftsmanship, reasonable rates, and friendly customer service. Call us now!

"Could not be happier with Jim's work. Remodeled master bath, kitchen, replaced front door, plus several other smaller tasks. Easy to work with. Has a talented eye for style and design. Kept me informed throughout the process. Has experience with the design board in my town (Reston). Never up-charged. I've recommended him to several neighbors already."

Brian B on August 2024

3DF LLC is a locally owned and operated company serving the Reston, VA area and surrounding communities. 3DF, LLC is a full service design & builder of your dream home and living environment. We can help expand your existing structure for you and your family to enjoy for years. Professional craftsmanship, reasonable rates, and friendly customer service. Call us now!

"Could not be happier with Jim's work. Remodeled master bath, kitchen, replaced front door, plus several other smaller tasks. Easy to work with. Has a talented eye for style and design. Kept me informed throughout the process. Has experience with the design board in my town (Reston). Never up-charged. I've recommended him to several neighbors already."

Brian B on August 2024


Avatar for Kozan Construction, LLC

Kozan Construction, LLC

4.75(
28
)
Approved Pro

Kozan Construction, LLC

4.75(
28
)
Approved Pro
Customers say: True professional
11 local quotes requested
41 years of experience

We have over 10 years of experience in the business. Here at Kozan Construction, LLC, we pride our company on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"OK, so Mr. Frank was very professional. All his team was very professional, very polite. They were on time and they went far and beyond of what they were supposed to do and did not charge me more than what they said, so I am very very very satisfied with the work that Frank did, and I wanted to thank him team for being so wonderful and such a great People, we don’t get that anymore in America, but he definitely gave me that. And I’m so happy that I hired him. I had five different people that I got proposals from, and I called all of them multiple times to check on things. And definitely Frank. He definitely made this right. So if anybody needs a Plumber, that’s the guy needs to be hired once again. Thank you very much for all your services. And I recommend Frank to anyone that needs plumbing work done Thank You,"

eddie j on December 2025

We have over 10 years of experience in the business. Here at Kozan Construction, LLC, we pride our company on reliability, great communication, integrity and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"OK, so Mr. Frank was very professional. All his team was very professional, very polite. They were on time and they went far and beyond of what they were supposed to do and did not charge me more than what they said, so I am very very very satisfied with the work that Frank did, and I wanted to thank him team for being so wonderful and such a great People, we don’t get that anymore in America, but he definitely gave me that. And I’m so happy that I hired him. I had five different people that I got proposals from, and I called all of them multiple times to check on things. And definitely Frank. He definitely made this right. So if anybody needs a Plumber, that’s the guy needs to be hired once again. Thank you very much for all your services. And I recommend Frank to anyone that needs plumbing work done Thank You,"

eddie j on December 2025


Avatar for Go Contractors, LLC

Go Contractors, LLC

4.12(
549
)
Approved Pro

Go Contractors, LLC

4.12(
549
)
Approved Pro
Customers say: Terrific value
41 years of experience
Free onsite estimate

Go Contractors LLC are specialists in a wide range of areas within residential construction and remodeling. There is no need to call any other contractor for your project as we have extensive experience working with residential projects in its entirety. Our goal is to make our clients satisfied, complete a high-quality job, and maintain a clean and organized workplace. Most importantly we hold ourselves accountable to maintain the respect, honesty, and good communication with our clients daily. Go Contractors LLC has 35 years of experience in this field of work. The owner of the company constantly maintains the project a priority as he efficiently checks for every detail of the project's progress. He believes it is an important aspect for the owner of the company to be involved and to ensure the client receives a satisfactory, high-quality home project.

"Mr. Gomez and his crew worked quickly and efficiently. The final price was just 5% above the initial estimate, even when it involved some additional tasks not included in the original work agreement. The only minor issue that it took two weeks after the bulk of the work was done for the crew to come again to finish the final work. Nevertheless, I would be happy to hire Go Contractors again."

Patrick H on June 2025

Go Contractors LLC are specialists in a wide range of areas within residential construction and remodeling. There is no need to call any other contractor for your project as we have extensive experience working with residential projects in its entirety. Our goal is to make our clients satisfied, complete a high-quality job, and maintain a clean and organized workplace. Most importantly we hold ourselves accountable to maintain the respect, honesty, and good communication with our clients daily. Go Contractors LLC has 35 years of experience in this field of work. The owner of the company constantly maintains the project a priority as he efficiently checks for every detail of the project's progress. He believes it is an important aspect for the owner of the company to be involved and to ensure the client receives a satisfactory, high-quality home project.

"Mr. Gomez and his crew worked quickly and efficiently. The final price was just 5% above the initial estimate, even when it involved some additional tasks not included in the original work agreement. The only minor issue that it took two weeks after the bulk of the work was done for the crew to come again to finish the final work. Nevertheless, I would be happy to hire Go Contractors again."

Patrick H on June 2025


TOP REMODELING LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

TOP REMODELING LLC

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

Top Remodeling is a Rockville remodeling contractor providing residential homeowners with the highest quality remodeling services. We provide professional remodeling services, including kitchen remodeling, bathroom remodeling, ADU construction, and more. In addition, we help you with design, planning, permit, and construction process. We take great pride in our top-notch remodeling services in Rockville and ensure that every project we do turns out perfectly.

Top Remodeling is a Rockville remodeling contractor providing residential homeowners with the highest quality remodeling services. We provide professional remodeling services, including kitchen remodeling, bathroom remodeling, ADU construction, and more. In addition, we help you with design, planning, permit, and construction process. We take great pride in our top-notch remodeling services in Rockville and ensure that every project we do turns out perfectly.

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FAQs for addition to existing structure building service projects in Washington DC, DC

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 Washington DC, DC 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.