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Top-Rated Addition to existing structure builders in Unionville - Updated Nov 2026

Avatar for MARVEL HOMES LLC
MARVEL HOMES LLC
4.9(
43
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

Approved

In business since 2002

Warranties offered

Customers say: True professional

"Fantastic! Devin and his team remodeled three of the four bedrooms in my townhouse in Clarendon: the first about four years ago and the other two bathrooms two years ago. He also built me a new closet in the master bedroom. The entire experience was amazing. The work is top quality - years later it still looks perfect and I have not had any problems - and his team is polite, professional, timely and they left my home spotless when they left. And since the work has been completed, Devin has helped me with little issues for free whenever I needed help. He is truly a talented professional and a stellar person. Can’t recommend highly enough!"
Before 2
After 2
Exterior
Exterior
Exterior

+8

1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Top Remodeling, LLC
Top Remodeling, LLC
5.0(
67
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"We had Top Remodeling handle our home addition, and they did an excellent job. From the initial consultation to the final touches, their attention to detail was impressive. The additional space seamlessly blends with our existing home and has added tremendous value."
New kitchen remodel
TOP REMODELING LLC
TOP REMODELING LLC
TOP REMODELING LLC
TOP REMODELING LLC

+40

Response time1 day
6 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Custom Home Creations LLC
Custom Home Creations LLC
5.0(
8
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"From the start to finish, we were very pleased. When Custom Home Creations Partner Garrett arrived, we were impressed with his thorough assessment of what work was needed and what we wanted done. His proposal was right on point with what we expected. The construction team arrived on time, were professional and they efficiently completed the project within the time frame we were quoted. We now have a beautiful, safe and secure pressure-treated wood deck and stairs and we look forward to staining it in early Spring. Here's our "Before and After" photos! We would definitely hire and recommend Custom Home Creations for future projects!"
New Market Deck 1
New Market Deck 2
Laundry Area
Primary Bedroom
Hallway

+27

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Talon Construction Inc
Talon Construction Inc
4.9(
28
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

In business since 2002

Warranties offered

Credit card accepted

"This was a great experience all around.  We looked at Talon and another construction company.  The other company had a hard time "getting it", i.e., what we were looking for, but when we dealt with Talon's designer and partner, they did.
We did get both bids as close as possible in terms of what was being offered.  Talon's pricing was competitive.
The project was contracted for in August 2013, and completed April 2014.  There was some initial delay waiting for utility companies to move the meters -- some of this was facilitated by Talon and some I had to work directly with the utility company.  This was the most frustrating part of the experience, but I think most of the delays were from the utilities themselves.  Washington Gas was particularly hard to work with.
Demo of our portico was finally initiated (start of construction) in November.  The construction crew worked through some tough weather as the winter of 2013-2014 was pretty fierce.  Loss of time due to weather was minimal, though, as unless there was a huge snowfall, they were out there.  The carpenters who were here on a daily basis were competent and friendly.
We couldn't be happier with the final product, and often neighbors come by or stop us on the street to compliment us on it.
"
Kitchen remodel
Kitchen remodel
Fall kitchen remodel
Kitchen renovation
Custom pantry

+31

Recommended by100%of homeowners
American Home Contractors Inc
4.7(
2,134
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

In business since 1986

Free estimates

Emergency services offered

"American Home Contractors performed roof repairs for me and they were absolutely fantastic!!! We recently moved into our home. At the time of purchase, there were water stains on one of the upstairs bedroom ceilings, however, the home inspector did not note any problems with the roof. After a number of rain storms, it appeared as if the water marks were becoming darker and more prominent. After one particularly bad storm, I used a ladder to touch the ceiling and discovered that it was wet. I called a well known roofing company (not American Home Contractors) to get an estimate on repairs. After that company came out, we were advised that one of the boot seals had degraded and that we needed it replaced. (The agent who came to the house also gave us the hard sell to replace our entire roof.) I was e-mailed the repair estimate which was over $500 to replace a boot seal!! I declined to have that company perform the work on our roof and started looking for another roofing company. Enter American Home Contractors. I received a mailer from American Home Contractors which advertised repairs of boot seals for $149. I called the company to double check that the advertised cost was accurate and I was told that it was. I scheduled an appointment with them and waited to see what would happen. The day before the appointment I was provided an appointment reminder as well as the name of the technician who would be coming to the house. On the date of the appointment, I received a phone call from the tech, Paul Cox, notifying me that he was running ahead of schedule and checking to see if he could arrive at my home a bit early. Wonderful! Paul arrived early and got to work surveying the roof. He did not give me the hard sell to replace my entire roof. He was candid about issues with my roof but did not press me to undertake any additional repairs. He performed the repairs right then and there and even went above and beyond to perform some additional repairs that we did not schedule at no additional cost. Based on my experience with Paul, I felt that Paul was honest, trustworthy, hardworking and dependable. American Home Contractors will definitely be earning my business again. I cannot recommend them enough!!!"
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GAF Decotech – Westminster, MD

+509

Recommended by95%of homeowners
Avatar for R W Construction, Inc.
R W Construction, Inc.
4.5(
46
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

In business since 1984

Free estimates

Emergency services offered

"RW CONSTRUCTION was fantastic. Rick and his crew were professional, reliable and fair. Hired him once - great work! So I hired him again! Would definitely recommendâ ¦and have. Thanks for some great work, Rick!"
Granite top on island
Treated Deck & Vinyl Rail
Family Room Addition
Kitchen Pantry
Oasis Decking

+3

Response time3 days
Recommended by100%of homeowners
Avatar for George's Painting Inc
George's Painting Inc
4.4(
397
)
Addition to Existing Structure - Build

Serving Unionville, MD and surrounding areas

In business since 1998

Free estimates

Credit card accepted

"They were very punctual and very efficient. I was constantly checking on the job and all the workers were very professional, and helpful with any questions or doubts i had during the job. I would recommend this company to anyone who wants reasonable price with great quality!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+22

Recommended by92%of homeowners
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FAQs for addition to existing structure building service projects in Unionville, MD

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 Unionville, MD 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.