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

Avatar for All-Phase Construction Company, LLC.
All-Phase Construction Company, LLC.
4.8(
177
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"Joe Stillman was an amazing contractor who repaired our roof and other inside damage from a fallen tree. There was extensive damage to parts of our house. He brought in an engineer to verify the correct repair of structural damage . Joeâ s team did ceiling and drywall in many rooms as well as painting, flooring, and plumbing. He was easy to work with and very honest. Joe made a stressful situation better because he took the time to answer our questions and make sure the job was done right. He also worked closely with our insurance company. I highly recommend All Phase Construction for home repairs and remodeling. Our home looks fantastic as a result! An honest company who does quality work! When they were done, their cleaners finished up and everything looked brand new!!"
Bay View Window addition
Staircase transformation
Bay View Window
Window Installment
Outdoor Deck addition

+43

Response time2 days
Response rate86%
4 neighbors recently requested a quote
Avatar for MNB Renovations
MNB Renovations
5.0(
10
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Matt and his team with MNB Renovations did a 32 x 24 addition that was basically a home build from the ground up. I am still surprised for the size of this project how stress free the process was. Matt was very detailed and checked in on everything to make sure we were getting what we wanted. In the end he asked us to make a list of anything that needed to be addressed and there was absolutely nothing to mention. They did a perfect job, the quality of the work is amazing, and the entire team was very nice, professional, and trustworthy! I absolutely recommend this company to others and will definitely use them again in the future!"
Kitchen Remodel
New stair case and great room
Oak staircase
Kitchen Remodel
Entry way

+181

Response time5 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Somrok, Inc. DBA Stephen Black Builders, Inc.
Somrok, Inc. DBA Stephen Black Builders, Inc.
4.4(
10
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Free estimates

Customers say: True professional

"We had Eric add an addition to our garage and extend the roof over the front porch. We also had the front porch replaced and had new shingles on the whole house. It was a fairly simple job complicated by lots of rain. We were kept informed of any delays and when contractors would be working. The job came out looking great. The best compliment you can say about an addition is that it looks like it was always that way and it certainly does in this case. I highly recommend Somrok Inc."
Before
Finished sunroom
Old front elevation
Old rear elevation
FRont finished elevation

+39

Response time1 day
2 neighbors recently requested a quote
Recommended by62%of homeowners
Avatar for Robert Horne Contracting
Robert Horne Contracting
4.5(
92
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"We added a full bathroom in our garage and an additional 16 ft wall with an interior door. The project went well and we’re very happy with the work that was completed. Bob is an amazing person to work with as is his wife Laura. They made the process easy from planning & permitting, to choosing the right materials and layout. Everything went as expected. Bob went above and beyond to insure the job was completed on time as we had a specific timeframe that we needed the job to be completed. We would hire Bob again for another project in the future. Thanks so much Bob!"
Additional Photos
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+32

Response time4 days
Response rate100%
4 neighbors recently requested a quote
William Staniscia
4.2(
15
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

In business since 1990

Free estimates

Offers commercial services

"Bill Staniscia was responsive, professional, and performed quality work. He had to remove bushes and a cracked sidewalk. He is studded out the frame for the larger sidewalk to the house. He laid stone for the foundation and his son tamped it. Then they poured the cement. I love it!!. It is beautiful and makes the curb appeal better. Thank you, Bill!"
Response time2 days
Response rate100%
13 neighbors recently requested a quote
Avatar for E.Z. General Construction Inc
E.Z. General Construction Inc
3.7(
6
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"The work included excavation, concrete patio, A frame roofing, electrical outlets, and railing addition. Work done in a timely fashion. Workmanship was excellent and cost factor extremely favorable."
Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Smooth Finish Bathrooms LLC
Smooth Finish Bathrooms LLC
5.0(
1
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

Approved

"Josh did a great job replacing all the windows in our sunroom. He also redid two bedrooms with new drywall and paint. Would highly recommend"
Remodeling - General Project
Custom shower with Tiled ceiling
Prep
Remodeling - General Project
Schluter heated floor system

+27

Response time1 day
Response rate100%
1 neighbors recently requested a quote
Avatar for 24/7 REMODELING
24/7 REMODELING
4.8(
13
)
Addition to Existing Structure - Build

Serving Denver, PA and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"Alex had done some major work on the house before I listed it, so I had no problem calling him about this project.  As usual, Alex came through in the clutch and found a licensed plumber to do the work, on time and up to code.  Alex has been my go-to guy twice in the last 6 months, and he got the job done on time and at the quoted price.  Although I live 1,000 miles away, he was great at keeping me up-to-date with phone calls and e-mails.    He is an A+ contractor that I would not hesitate to recommend to anyone who asks."
Additional Photos
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Additional Photos
Additional Photos

+57

Recommended by90%of homeowners
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FAQs for addition to existing structure building service projects in Denver, PA

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 Denver, PA 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.