Home Additions in Pittsburgh, PA
When your family has outgrown the house but not the neighborhood, an addition is the answer. From an in-law suite to a full two-story addition, we manage it from groundbreaking to the final walkthrough.
Veteran-Owned
In-House Crew
4.9 Stars on Google
BBB Accredited
Love Your Home, but You've Run Out of Room?
You need another bedroom, a first-floor suite for aging parents, a bigger kitchen, or a garage, but you don't want to move and start over somewhere new. An addition is the right call, except it's also the most complex project a home can take on: foundation, framing, rooflines, permits, and finishes all have to tie into the existing house seamlessly. Get the wrong crew and you're left with an addition that looks bolted on and a budget that's long gone.
How We Build Your Addition
Step one | In-Home Consultation and Design
We walk your home, talk through what you need, and bring in designers and architects to put the addition on paper.
Step two | A Clear Plan, Quote, and Permits
You get an itemized proposal with cost and timeline, and we manage the permitting and the subcontractors involved.
Step three | We Build It, Start to Finish
From the excavator breaking ground to our crew mopping the floors, one team manages the entire build and ties it cleanly into your existing home.
Any design change along the way is priced and approved with you before it happens.
What a Home Addition Can Cover
Site work, foundation, and framing
Single-room additions, first-floor suites, and full two-story additions
Garages and attached living space
Rooflines and exteriors matched to your existing home
Permitting and coordination of all required trades
Interior finishes that match or upgrade the rest of the home
Design and architectural support
"Three projects, two bathroom remodels and a first-floor in-law suite, all turned out perfect. The bedroom suite came out better than we could have imagined." — Janelle W.
"Added a half bath in a tight space where there was nothing before. They made it work beautifully and coordinated seamlessly with our plumber. The only contractor we call." — Colin C.
"Quinlan built our 26'×30' two-story addition, master suite up top and a two-car garage below, on time and on budget, even through weather and supply delays. Their craftsmanship far exceeded anything we could have designed ourselves." — Adam K.
The Additions Other Contractors Won't Touch Are the Ones We're Known For
Additions are the most demanding projects we take on, and the ones that show what our in-house model is built for. We manage the full scope, from breaking ground to matching the new rooflines and finishes into your existing home, and we keep the whole thing on the timeline and price we set. The two-story addition, the first-floor in-law suite, the spaces that have to feel like they were always part of the house: that's our work. Quinlan Contracting is veteran-owned, fully licensed and insured, BBB accredited, and rated 4.9 stars across more than 40 reviews.
Need More Room Without Leaving the Home You Love? Let's Talk.
More About Home Additions in Pittsburgh
Quinlan Contracting builds home additions in Pittsburgh and the surrounding western suburbs, including Moon Township, Sewickley, Coraopolis, and Robinson. Our additions range from a single room or a first-floor in-law suite to full two-story additions with a master suite and garage. A home addition is the most involved project a house can take on, tying new foundation, framing, rooflines, and finishes into the existing structure, which is exactly why having one accountable crew matters. We manage the entire addition from the first design consultation and permitting through the final walkthrough, hold to the quoted price, and communicate every detail and every change before the work is done. If your family has outgrown your home but not your neighborhood, we'd be glad to walk the property and talk through what an addition could look like.
Frequently Asked Questions
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Additions vary widely based on size and complexity, from a single-room addition to a full two-story build. We put together an itemized proposal so you know the full cost before we start.
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Yes. We manage permitting and bring in designers and architects to put the addition on paper before we build.
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Additions typically run several months depending on size. We give you a realistic timeline up front and keep you updated at every phase.
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Yes. We match rooflines, exteriors, and finishes so the addition looks like it was always part of the house.
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We hold to our quoted price, and any design change is priced and approved with you before the work happens.
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Moon Township, Sewickley, Coraopolis, Robinson, Imperial, Oakdale, McDonald, Monaca, and the greater Pittsburgh area.
You Might Also Be Thinking About
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Whole-Home Remodeling
Pairing an addition with a full renovation?
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Kitchen Remodeling
Expanding or relocating the kitchen as part of the addition?
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Basement Remodeling
Add finished living space below as well.