
Addition in Wellesley, MA
New square footage that looks like it was always there
(508) 598-8704Free, no-obligation estimate on Wellesley properties · Fully insured
Free Addition Estimate
Tell us about your Wellesley property and we will come look at it.
Addition for Wellesley Homes
Building an addition in MetroWest means designing for heavy wet snow loads, repeated freeze-thaw cycling from December through March, and humid summers that swell untreated wood. A new roof plane meeting an old one is exactly where ice and water find their way in, so on Wellesley additions we detail that intersection first and everything else follows from it.
An addition is the most demanding thing a residential builder does: new foundation, new framing tied into old, roof lines that have to resolve honestly, and mechanicals extended from systems sized for a smaller house. We do all of it.
What Wellesley Properties Actually Need
- The housing stock here
- Substantial older homes here have detailed exterior trim with profiles no longer stocked, so repair means matching by hand rather than ordering.
- Working on the site
- Established landscaping and stone walls sit close to the house, and protecting them is part of the site plan rather than an afterthought.
- Permits and inspections
- The town applies detailed review to exterior alterations, and expects material and profile specifications with the application.
What Goes Wrong in MetroWest
Zoning discovered too late
Setbacks, lot coverage, and septic capacity kill more additions than budget does - and usually after money has been spent on design.
The bolted-on look
Mismatched rooflines, siding that doesn’t align, and window proportions that give it away instantly from the curb.
Leaks where old meets new
The junction between existing and added structure is the single most common failure point, and the hardest one to fix afterward.
Addition Services We Provide in Wellesley
- Second-story additions
- Full framing, roofing, siding, and finish
- Garage and mudroom additions
- Foundation, excavation, and slab work
- Primary suite and in-law additions
- Single-room and multi-room additions
How Your Wellesley Project Runs
- 01
Free Estimate
Call us and we come out to your property, walk the job with you, and put real numbers on paper - no cost, no obligation.
- 02
Scope & Timeline
We agree on the exact scope, materials, and a clear start-to-finish timeline before a single tool comes off the truck.
- 03
We Build It
Our own carpenters do the work - framing, roofing, windows, decks. One crew, one point of contact, no subcontractor roulette.
- 04
Final Walkthrough
We walk the finished job with you and don't call it done until you say it is. Site left clean.
We build additions across Wellesley and the surrounding MetroWest towns, foundation through final trim. Call (508) 598-8704.
Questions
Addition in Wellesley - FAQ
Yes - Wellesley is part of our regular service area. We're based at 190 Bolton St, Unit 11, Marlborough, MA 01752, and addition is one of the 8 services we handle in-house.

- (508) 598-8704
- 190 Bolton St, Unit 11, Marlborough, MA 01752
- @ofirconstruction
- Serving all of Massachusetts
Free Estimate
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