Home Addition Builders
Philadelphia, PA
More space for your family, without the stress of moving. We’ve built custom home additions across Philadelphia for 16 years, from rowhome second stories to suburban in-law suites. Licensed, insured, and trusted by 200+ homeowners.
Why Philadelphia Homeowners Choose Us
Choosing who builds your addition is the biggest decision of the project. Families across Philadelphia trust us with it, and keep sending their neighbors.
Design and Build Under One Roof
We handle design and construction together, so your plans and your build never get lost between two companies. One vision, one team, start to finish.
Licensed, Insured & 5-Star Rated
Fully licensed and insured under PA HIC #1234567, with 200+ five-star reviews from local homeowners who trusted us first.
One Project Manager
You get a single point of contact who knows your project inside out. No chasing crews, no wondering what’s happening this week.
Fixed Pricing, No Surprises
You get a clear written price up front, covering design, materials, labor, and permits. Nothing gets added without your approval.
#1 Home Addition Company in Philadelphia, PA
Earning the top spot isn’t about saying it. It’s about doing the work that makes homeowners say it for you. We’ve completed 300+ projects across the city and surrounding counties, from second-story builds on Fishtown rowhomes to in-law suites and kitchen expansions in the suburbs.
Our 200+ five-star reviews tell the rest of the story. Homeowners trust us because we show up, communicate clearly, and finish what we start. We’re fully licensed and insured under PA HIC #1234567, and a proud BBB member
Call 215-535-3429 and see why Philadelphia homeowners choose us.
70%+
Average Return
at Resale
A custom addition adds lasting value to the home you already own.
ADDED VALUE
Increase Your Home’s Value With a Custom Addition
An addition does more than give your family room to breathe. It’s one of the smartest investments you can make in your home. Every square foot you add is square footage an appraiser counts and a future buyer pays for, especially in a market as tight as Philadelphia’s.
How We Keep Your Deck on Track
- Extra bedrooms and bathrooms raise your home’s value more than almost any other upgrade.
- An in-law suite or ADU can add rental income potential, a strong draw for Philadelphia buyers.
- A finished, permitted addition counts toward your official square footage, unlike unpermitted work.
- Staying in a desirable neighborhood multiplies the return, your block does part of the work for you.
Expand Your Home Without the Stress of Moving
Moving sounds simple until you add it all up: the realtor fees, the closing costs, the higher mortgage, and the goodbye to a neighborhood you love. A home addition gives you the space without giving up the life you’ve built, whether you need another bedroom, a bigger kitchen, a suite for aging parents, or a real home office.
You keep your block, your schools, your commute, and your neighbors, and you add permanent square footage and value to the home you already own. Moving in this market can cost tens of thousands of dollars before you gain a single extra room, while that same budget put into an addition stays in your home as long-term value.
We handle the whole project, from design and permits to construction, so the only thing that changes is how much room you have.
Open everyday from
8:00-6:00
Call to ask any question
123-456-7890
Our Remodeling Process
We Offer Home Addition Remodeling Services In Philadelphia
We’ve refined our process over 16 years so a home addition never feels like a guessing game. From the first visit to the final walkthrough, you always know what’s happening, who’s doing it, and when. One team, one point of contact, and no surprises along the way.
Free In-Home Consultation
We visit your home, look at your space, and talk through what you need and what your lot can support. You get honest answers on the spot and a realistic ballpark, not a number pulled from thin air.
Design and Planning
We create your layout, often with 3D renderings so you can see the addition before it’s built. We run your zoning check, handle every L&I permit, and lock in a fixed, written price with no surprises.
Construction
Our own crew builds your addition on a set schedule, from foundation and framing to HVAC and finishes. We seal off the work area, protect your home, and keep you updated through one project manager.
Final Walkthrough
We walk every inch of the finished space together. Nothing is done until you’re happy with it. You get an addition built to code, matched to your home, and backed by our workmanship warranty.
Licensed, Insured & PA-Registered Addition Builders
A home addition is one of the biggest investments you’ll make in your house. The builder you hire should be one you can verify, not just trust on a handshake. We’re a registered Pennsylvania Home Improvement Contractor, license #1234567, fully insured for both liability and workers’ comp.
That number appears on every contract and every permit we file. Every addition we build is permitted through Philadelphia’s Department of Licenses and Inspections and inspected to code at each stage. That’s your guarantee the work is sound, legal, and safe for your family.
Update Your Bathroom to Match Your Style
Build Up vs. Build Out: Which Is Right for You?
Most additions come down to one choice: build up or build out. Build up means adding a second story or expanding over an existing floor. Build out means extending your home’s footprint across your lot. The right call depends on your lot size, your budget, and what your home can structurally support.
Build out is usually simpler and easier to live through, but it eats into your yard and needs open space, something many Philadelphia rowhomes don’t have. Build up keeps your yard intact and suits tight city lots, but it costs more because it often requires reinforcing the foundation and reframing the roof.
On a narrow Philadelphia rowhome, building up is often the only real option, while suburban homes in Bucks or Montgomery County usually have the room to build out. We assess your lot, foundation, and zoning on the first visit, then tell you straight which path makes sense for your home and budget.
our Services
Types of Home Additions We Build
Whatever space your family needs, we design, permit, and build it to fit your home and your lot.
Second-Story Additions
Out of yard but need more room? We build up. A second-story addition doubles your living space without touching your footprint, ideal for tight Philadelphia rowhomes and city lots where building out isn’t an option.
In-Law Suites & Guest Suites
Keep family close with their own private space. We build in-law and guest suites with a bedroom, full bath, and often a kitchenette, perfect for aging parents, adult children, or visiting guests.
Room Additions & Bump-Outs
Need just a little more space? A room addition or bump-out adds a bedroom, office, or extra square footage to a kitchen, even on smaller lots. A targeted way to solve a cramped layout without a full build.
Sunroom Additions
Enjoy the outdoors all year. A sunroom brings in natural light and extra living space while staying protected from Philly’s rain, bugs, and cold. A bright, comfortable room you’ll use in every season.
Garage Additions & Conversions
Add a garage for parking and storage, or convert an existing one into heated living space. Either option adds usable square footage and real value, especially on older Philadelphia homes that lack one.
Kitchen & Living Space Expansions
Make room for the way your family really lives. We expand cramped kitchens and living areas into open, functional spaces, the upgrade that adds the most everyday comfort and resale value.
Featured Plumbing Services in Philadelphia
We Match Your Addition to Your Existing Home’s Style
The worst additions are the ones you can spot from the street, the part that clearly wasn’t there before. A great addition disappears into the home. That’s the standard we build to.
We line up rooflines, match siding and brick, carry over window styles, and keep the proportions consistent with your original home. We carry your trim, flooring, and ceiling heights into the new space so it flows like one home, not a house with a room glued on.
When we’re done, it should look like your home was always this size.
What to Expect During Construction — Living Through an Addition
The part most homeowners worry about isn’t the finished addition. It’s the weeks of living in a construction zone to get there. We get it, and we run our projects to keep your daily life as normal as possible.
There will be noise, dust, and crew on site during work hours. But a good builder contains it. We seal off the work area from the rest of your home, set up dust barriers, and keep your living spaces usable while we build. You stay in your home through most additions, not a hotel.
We protect what’s yours. Floors get covered, belongings get moved out of the way, and the site gets cleaned at the end of each day. Your home stays secure overnight, with the work area closed off and locked up.
Free Estimates | Flat-
Rate Pricing | Same-Day
Appointments
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Biggest Mistakes Philadelphia Homeowners Make With Additions
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What’s the Most Expensive Part of a Home Addition?
The foundation, framing, and structural work are typically the most expensive parts of a home addition. These are the hidden, skilled-labor stages that make your new space safe and properly tied into the existing home, and they’re not where you want a contractor cutting corners. Second-story additions cost more here because they often require reinforcing the existing foundation and reframing the roof. High-end finishes can also raise the total, but the structure is where most of the budget goes.
What Home Additions Give the Best ROI in Philadelphia?
Added bedrooms and bathrooms deliver the strongest return, followed by kitchen expansions and in-law suites. These spaces matter most to future buyers, so they recover the highest share of their cost at resale, often 70% or more in the Philadelphia market. In-law suites and ADUs add a bonus: rental income potential, which is a real draw in a city full of students and young professionals. The key is a permitted, well-built addition, since unpermitted work doesn’t count toward your home’s value.
Are You a Good Candidate for a Home Addition?
If you own your home and have either yard space to build out or a structure that can support building up, you’re likely a good candidate. Most Philadelphia homeowners qualify, even those still paying a mortgage, since many use home equity to finance the project. The main factors are your lot size, your zoning, and your home’s foundation. We assess all three on the first visit and tell you honestly whether an addition makes sense for your home, and which type fits best.
Testimonials
What Our Philadelphia Clients Say
“We loved our rowhome but ran out of space when our second kid arrived. Johnny’s team built a second story that looks like it was always there. They handled every permit, stayed on schedule, and kept the house livable the whole time. We never had to move.”
Brian Dean
Fishtown
“My mother moved in with us, so we needed a real suite with its own bath. Three contractors quoted us, and Johnny Comoara was the only one with a clear, written price and no games. The work was clean, the crew was respectful, and the suite is beautiful. Worth every penny.
Priya
Havertown
“Our old kitchen was cramped and dark. They bumped out the back of the house and opened the whole space up. The new addition matches our 1920s home perfectly, you genuinely can’t tell where the old ends and the new begins. Highly recommend them.”
Rachel
Chestnut Hill
Neighborhoods We Serve Across Philadelphia
A home addition in a Fishtown rowhome is a very different job than one on a half-acre lot in Bucks County. Lot size, zoning, and the age of the home all change the plan, and we build in every one of these conditions. Wherever you are in the region, you get a team that already knows how additions work on your street.
FAQ
Philadelphia Homeowners Ask — We Answer
Homeowners in Philadelphia often have the same questions before starting a remodel. Many properties are older and require plumbing, electrical, or structural review. City permits and inspections also affect timelines and cost.
These are the questions Philadelphia homeowners ask us before they commit to a remodeling project.
We answer them the same way every time. Straight, honest, and without the runaround.
Contact us
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123-456-7890