McComsey builders
Licensed in Pennsylvania (PA015145)
Andersen Certified Contractor
Family-owned since 1986
What makes Home Additions & Renovations a good fit
This is the work most of our clients come to us for. The majority of our renovations include an addition, and the majority of our additions include a renovation. Most of the families who hire us love where they live and want to stay there. They just need the home to grow with them.
Good Fit
Not a Fit
Most of our clients fall into one of two situations. They love where they live but need more space, a better layout, or a home that fits their family. Or they’re tired of fixing old-house problems and ready to modernize the exterior, the systems, and the finishes.
Often it’s both, which is why the majority of our projects combine an addition and a renovation at the same time. Whatever the situation, we start with what your family needs and build the project around that.
HOME ADDITIONS & RENOVATIONS Projects
These are a few of the recent additions and renovations we’ve completed in Chester County and the surrounding areas Click any one to read the full story.
The McComsey difference
Our name has been on the trucks since 1986 — and on every project we’ve ever built. Here’s what that means when it’s on yours.
We’re boutique by design. Every home and every kitchen is one of one. We start by sitting down with you, sometimes literally on lawn chairs in an empty house, and we draw cabinets specific to how you cook and gather. When trees come down on your property, we mill them into the floors, beams, and counters of your new home.
You’ll get a JobTread login with daily field reports, photos, the live budget, every file, and a direct line to our team. Weekly walk-throughs happen on site. You see what we see. Our kitchens come in within 5% of the original budget, and we hand you the keys when we said we would.
Bob and Mike took over from their dad, and the company they are building looks like the one they grew up around: tight communication, in-house cabinetry, a trusted bench of architects and trade partners, and a small team that does serious work. The McComsey name is on every job, and we treat your home like it is our legacy too.
Process
We created six clear steps so that once we start building there aren’t surprises. We take our time getting the budget right so the build can move fast and we limit disruption to your life.
It starts with a conversation. We ask who sent you our way, whether you have plans yet, and the kind of budget you’re working with. The goal is to make sure we’re the right team for what you have in mind before either of us spends another hour on it.
We come out to the property, walk the space with you, and review your plans if you have them. If you don’t have plans yet, we take photos and talk through the scope of work. You get the benefit of forty years of doing this work, telling you straight what will and won’t work and how a renovation or addition really comes together.
We send the plans out to our trade partners, scope every piece of the job, and on bigger or more complex projects, bring them back to the property for a second walkthrough. Their input is what gets us to a real, line-item budget.
We take the trade partner proposals, fill in anything missing, and build out a detailed Excel budget with specific line items. Then we sit down with you and walk every single line. You see why each piece costs and why, what’s included, and where there’s room to flex. By the time we're done, we're all reading the same numbers on the same page.
Once the budget feels right and we agree on a timeline, we lock it in as a signed approved order in JobTread. That's your starting point. As real-life decisions and changes come up along the way, every cost change gets documented against that baseline, so nothing’s ever a surprise.
Before we break ground, we introduce you to the people who’ll be running your project day to day. That means Mike, Evan, and your field lead. You’ll get their phone numbers, so that you know who to call, and any one of us is reachable when you need an answer.
Common Upgrades
Most of our clients come in knowing the basics they want. A handful of additions come up over and over again, and we’ve built every one of these into recent homes.
The most popular addition. Almost always paired with a kitchen renovation.
A new primary bedroom and bathroom, often on the back of the house with a private outdoor space.
Open spaces that finally let the family gather without bumping into each other.
Often part of a larger primary-suite or family-wing project.
We regularly have multiple in the pipeline.
Adding a full second floor to a ranch-style home, with new roof, new structure, and a new staircase.
The combination projects that make up the majority of our work.
Tell us what’s on your list. We’ll figure out how it fits the rest of the project.
Our network
Matched to your taste, budget, and the kind of home you want to build.
Architecture & Design
What we have is a deep network of architects and civil engineers across Chester County. We’ll match you with the right partner based on your taste, budget, and the kind of home you want to build.
FAQs
Don’t see what you’re looking for? Contact Us!
Yes, and most of our clients do. We set up a temporary kitchen in your basement or garage, build temporary insulated walls with plastic sheeting, and run negative-pressure systems to pull dust out the window. We’ve kept houses fully enclosed during the entire structural phase of an addition. Never open to the elements. One client told us the home stayed more livable than she ever expected. Her family hosted Christmas in the new kitchen before we’d finished the punch list.
It depends on what we’re building. Most of our additions and whole-home renovations start at $300,000. A serious whole-home renovation with a major addition can run $2 million or more. One recent project came in at about $2.5 million, roughly $600 per square foot, after we factored in new foundations, a new septic, a new driveway, stormwater management, and a new electrical service. Site work is often the biggest single cost driver, and PennDOT permits add real time and money to the project if your driveway connects to a state highway. We build you a detailed line-item budget before you sign anything and walk through every line together.
Yes. Most builders pick one or the other. The majority of our projects involve both at the same time, because that’s what families actually need. We sequence the work so the new addition flows into the renovated existing space, and we don’t hand you off between two crews.
Most projects do. We don’t draft in-house, but we have long relationships with architects and civil engineers across Chester County, and we’ll match you with the right partner. If you already have plans, we’ll review them and flag anything that needs to be addressed before you spend more.
It depends on scope. A kitchen bump-out with a renovation can run about six months. A full whole-home renovation with multiple additions can run two years. We give you a realistic timeline before you sign, and we hand you the keys when we said we would.
$300,000. We focus on larger custom additions and renovations, not small one-room projects.
Testimonials
From the families we’ve built for, in their own words.
What we build
Whether you’re planning a kitchen or breaking ground on a custom home, we bring the same attention to every project — from first walkthrough to handed-over keys.
Start a conversation
Tell us about the space, the family, the list of things that aren't quite working anymore.
