Room additions, second stories, sunrooms and in-law suites — built foundation to finish by one local team, tied into your home watertight and designed to look like it was always there. 38 years in Central New York.
Serving Central NY
Homeowner Rated
One Contractor
An addition is the biggest project most homeowners ever take on — and the one with the most ways to go wrong. It’s not one job; it’s a foundation, framing, a new roof tied into the old one, siding that has to match, windows, and a finished interior. Hire the wrong contractor and the seams show — literally, at the rooflines, and figuratively, when the roofer blames the framer.
River Roofing and Construction has built and protected Central New York homes for 38 years. We self-perform every layer of an addition — foundation to finish — so the new space is watertight where it meets the old, matched so you can’t tell where the house ends and the addition begins, and built by one team that owns the whole result.
Family rooms, bedrooms, home offices and expanded living space — added to your existing footprint and tied in seamlessly.
Build up instead of out to gain bedrooms and baths while preserving your yard — with the structure evaluated to carry the load.
Bright, comfortable space to enjoy CNY summers and autumns — insulated and built for year-round use if you want it.
Private, self-contained living space for family or guests, designed for comfort and accessibility.
Targeted expansions — a bigger kitchen, a walk-in closet, a master bath, or headroom upstairs — without a full addition.
Attached or detached garages built to shrug off lake-effect snow and protect what's inside.
Anyone can frame up a box in the backyard. The difference between an addition that lasts and looks original — and one that leaks and looks bolted-on — is three things, and all three are where the new work meets the old.
Where the new roof meets the existing roof, where new siding meets old, where the new foundation joins the house — these connections are where additions leak. We don't design the transition and hand it to a sub; we build it.
A good addition looks like it was always there. That means matching the roofline, blending the siding, and choosing windows that fit the home's style — all self-performed, so we control the match.
A real foundation below our frost line, framing sized for CNY snow load, and code-compliant engineering. Plus heat loss on far more exposed surface than a normal room — so insulation and air-sealing aren't optional here.
Years Of Experience Serving Central NY
An addition is the whole building — its cross-section contains every system the rest of our work covers, ground to roof:
Every one of these layers is a trade most contractors hire out. For us, each one is a service we already provide across Central New York — so an addition isn’t six subcontractors loosely coordinated; it’s one company doing what it already does best, from the footing to the final coat of paint.
An addition is backed by the manufacturer warranties on the materials — roofing, siding, windows and finishes — plus our workmanship warranty on the build.
Because an addition ties into your existing home, the workmanship on those connections is what protects you long-term. We stand behind ours.
The best proof is a photo where you can’t spot the addition — seamless roof and siding matches from around Central New York.
The whole thing — foundation, framing, roof, siding, windows and finished interior. We self-perform the trades most builders sub out, so one team owns the entire result.
That’s the goal, and it’s where doing our own roofing and siding pays off. We match the roofline, blend the siding and choose windows that fit your home’s style, so the addition reads as original rather than bolted-on.
It depends on size and complexity — a family-room addition often runs a few months, longer if it includes a kitchen or bath. We’ll give you a realistic timeline with your estimate.
Yes. An addition needs code-compliant plans, structural work and permits, and we manage all of it as part of the project.
Often, yes — building up is a great way to gain space while keeping your yard. We evaluate whether the existing foundation and walls can carry the load and reinforce where needed.
Not if it’s built right. An addition has more exposed surface than a normal room, so we design for it — proper insulation, air-sealing and energy-efficient windows made for our climate.
Yes — manufacturer warranties on the materials plus our own workmanship warranty on the build, including the connections to your existing home.
Consultation, then design and engineering to make it match your existing home, permitting, foundation set below the frost line, framing and a roof tied in watertight, the envelope (siding and energy-efficient windows and doors), interior finish, and a walkthrough with you when it’s done.
It depends — the size and type (a bump-out versus a full second story), foundation and structural work, whether it includes a kitchen or bathroom, how the new roof, siding and windows tie into and match the existing home, finishes, and site access. An addition starts with a real conversation, not a guess — we’ll look at your home and put it in writing.
We serve homeowners across Central New York and the surrounding region, reaching north toward Oswego, Fulton and Watertown. If you don’t see your town listed, just give us a call.
Get a free, no-pressure consultation from a local contractor that’s been building and protecting Central NY homes for 38 years — foundation to finish.
