Addition in Cambridge, MA
New square footage that looks like it was always there
(508) 598-8704Free, no-obligation estimate on Cambridge properties · Fully insured
Free Addition Estimate
Tell us about your Cambridge property and we will come look at it.
Addition for Cambridge Homes
Building an addition in Greater Boston means designing for winters tempered by the coast but still cycling hard across freezing, with wind accelerated between tightly spaced buildings. A new roof plane meeting an old one is exactly where ice and water find their way in, so on Cambridge 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 Cambridge Properties Actually Need
- The housing stock here
- Triple-deckers and Victorians here have rear porch stacks that carry three floors of egress, and those structures are the most common serious defect found on inspection.
- Working on the site
- Setbacks are measured in inches, so most exterior work happens from staging erected over a neighbour s ground by agreement.
- Permits and inspections
- Historic and neighbourhood conservation districts cover much of the city, and exterior change is reviewed before permit.
What Goes Wrong in Greater Boston
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.
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.
Addition Services We Provide in Cambridge
- Second-story additions
- Full framing, roofing, siding, and finish
- Garage and mudroom additions
- Primary suite and in-law additions
- Foundation, excavation, and slab work
- Single-room and multi-room additions
How Your Cambridge 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 Cambridge and the surrounding Greater Boston towns, foundation through final trim. Call (508) 598-8704.
Questions
Addition in Cambridge - FAQ
Yes - Cambridge 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
Get Your Free Construction Estimate
Call and we answer during business hours. Prefer to write it down? The request form is at the top of this page.
No obligation and no cost for the estimate. We reply within 24 hours and we don't share your details.