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

Avatar for Krain Construction LLC
Krain Construction LLC
4.7(
28
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"Once started the work was done quickly. The original scope of work for concrete finish was changed at my request to use exposed aggregate making the pad look like one single pour. Wow, looks great, money well spent. Gable roof with cathedral ceiling and finishes match perfectly. Looks like it has always been part of the house. Light landscaping was also provided to repair lawn from construction damage. This was done by the contractor without charge or my request. There was a small leak that the contractor repaired after several trips. This was resolved to my satisfaction. The point here is the contractor took responsibility and returned until this was resolved. We love our new patio, it’s perfect!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+35

Response time2 days
Response rate100%
5 neighbors recently requested a quote
Furko Construction
4.4(
77
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 1996

Emergency services offered

Customers say: Super punctual

"We had a large amount of damage from a fallen tree on our detached garage related to a storm - clearly an emergent situation, where time was of the essence. I contacted Doug's company, and not only did he return my call promptly (a rarity in and of itself), he was at my house assessing the job the following morning. He is knowledgeable, professional, polite and extremely thorough. He got me a bid within 48 hours, which was remarkable compared to the turnaround from other firms, and which was also very helpful when dealing with the insurance company, as this was an unforeseen insurance claim related to a weather event - the price of the bid was very competitive and fair. Ultimately, we had to go with the firm that the insurance company was recommending, so our hands were tied - but I would certainly have felt more than comfortable having Doug's company complete this job. He is now at the top of my list for any future general construction work that I may need done at my property. You won't regret contacting Furko Construction for your job."
Response time2 days
Response rate100%
1 neighbors recently requested a quote
Avatar for Shane Moran Masonry LLC
Shane Moran Masonry LLC
4.4(
29
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Shane and his team were reliable and professional. They did excellent work and were better priced than all competitors. The job involved removing an old, failed retaining wall and building a new one with steps. They also installed proper drainage to secure the hillside from future shifting. We won't hesitate to hire him again!"
Addition
Remove asphalt and reinstall concrete driveway
Addition
Remove asphalt and reinstall concrete driveway
Addition

+15

Response time1 day
4 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Brody's Services
Brody's Services
5.0(
20
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"I recently had my bathroom completely transformed by Brody and his crew, and I could not be happier with the results. From the initial consultation to the final walk-through, their professionalism and attention to detail were outstanding. They listened to my vision and brought it to life with stunning tile work, modern fixtures, and impeccable craftsmanship. The project was completed on time and within budget, which was a pleasant surprise given the quality of work. The team was courteous, clean, and communicative throughout the entire process. My bathroom now feels like a spa retreat, and I have Brody?s Services to thank for that. Highly recommend for anyone looking to elevate their bathroom experience."
Bathroom
Bathroom
Bathroom
Bathroom
Bathroom

+2

Response time8 hrs
Response rate97%
16 neighbors recently requested a quote
Avatar for Rough Diamonds Construction LLC
Rough Diamonds Construction LLC
5.0(
14
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Rough Diamond Construction Company did an excellent job remodeling my family room/basement. Nate's attention to detail and his expertise was well worth every dollar paid. He was always in contact with me as well as advocating for me when I had a water problem in my basement with the company who initially made the repair. Because of the water problem I experienced in the summer, I decided to have the entire room renovated - new floors, walls, ceiling, doors, etc. Nate and his crew were professional and efficient. The end result is that the room is absolutely beautiful. I would recommend Nate and his team to anyone - you won't be sorry."
My jobs
My jobs
My jobs
My jobs
My jobs

+8

Response time11 hrs
Response rate90%
1 neighbors recently requested a quote
Avatar for Thornburg Construction
Thornburg Construction
5.0(
14
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"I hired to Josh to work that includes replacing the roof of my garage, clear my backyard, rebuild my backyard fence, my patio area, my bathroom, my front porch, replace windows, and doors. Josh always does amazing work. He is thorough, thinks outside the box, and is always upfront, honest, and professional. Never rude or disrespectful. He’s the ONLY ONE allowed to work on my home."
Our Completed Projects
Our Completed Projects
Our Completed Projects
Our Completed Projects
Our Completed Projects

+47

17 neighbors recently requested a quote
Avatar for C & C Home Remodeling
C & C Home Remodeling
4.5(
11
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"I originally had C & C completed a roof replacement and siding with soffit replacement. Calvin & Chris were great to work with. They communicated clearly when they would be able to start our project, arrived on time, was very respectful of our home, answered any questions, explained what to expect for the current day and the following day prior to leaving for the evening. I used them again when I needed my bathroom remodeled and would use them again and again should I need a home improvement project. I appreciate their responsiveness and professionalism."
Siding Project
Siding Project
Additional Photos
Additional Photos
Additional Photos

+62

7 neighbors recently requested a quote
Recommended by80%of homeowners
A & J Contracting Company, LLC
4.2(
36
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 1995

Free estimates

Customers say: Quick response

"We hired Anthony to perform a bathroom and basement remodel. I can't say enough about how pleased we are in every aspect of Anthony and Mark's work, cost and professionalism. The communication and reliability was always timely, thorough and just excellent, which are things that lack in a lot of contractors we have dealt with in the past. Although we had many challenges during the job, Anthony handled them all with flexibility. It was a true collaboration from beginning to end. Not only was he easy to deal with, but the work was done way above our expectations with a focus on attention to detail. He also made sure everything was cleaned up at the end of every day, even if I said not to worry about it. Overall, these guys went the extra mile and made a difficult job enjoyable for us. We will be coming back to A&J for any plumbing or remodeling needs in the future."
 bathroom before picture
 bathroom after picture
 kitchen remodel photo
 Rough framing for basement remodel
drywall work for basement remodel

+23

1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Mangone Contracting
Mangone Contracting
4.5(
16
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

In business since 2005

Free estimates

Customers say: True professional

"Eric and his crew did an outstanding job on the addition to our home. From start to finish, their professionalism and attention to detail were exceptional. The craftsmanship is truly beautiful, and you can tell they take great pride in their work. I’ll admit, I’m not always the easiest person to please because I have high expectations—but Eric and his team exceeded them. They listened carefully to what I wanted and delivered exactly what I asked for, and more. We are absolutely thrilled with the finished result. If you’re looking for a contractor who is meticulous, reliable, and committed to doing things the right way, I highly recommend Eric and his crew."
Two Story Addition
Custom Cathedral Ceilings
Custom Tiled Shower
Custom Framing
additions

+6

Response time3 days
8 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for Pressure Makes Perfect
Pressure Makes Perfect
4.7(
7
)
Addition to Existing Structure - Build

Serving Carnegie, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"The complete service was actually one of the best experiences that I’ve had with a contracting company. They were professional, timely, and the main guy that I was working with communicated with me very well. Everything that was done to my home was explained to me and I greatly appreciated that. Would definitely work with them again, and would recommend them for all contracts no needs."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time1 day
Response rate100%
1 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Carnegie, 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 Carnegie, 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.