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A completed two-storey home addition in Toronto's east end

Free guide for East Toronto & Durham families · 2026 edition

We published a completed Toronto addition budget, line by line: $582,520. Read it before you talk to any builder.

The Home Addition Cost Guide 2026: cost ranges from 100+ completed projects, zoning explained for homeowners, and the honest stay-or-move math. Fifteen pages, no fluff, and no obligation.

Free download. We email your copy right away, along with the numbers most builders won't put in writing.
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Est. 1997 · 100+ additions completed · Fixed-price contracts · Featured in CBC, Toronto Star & Fortune

Our insights & projects have been featured in

CBCToronto StarFortuneCanadian PressGlobe & Mail

Why we wrote this

Nobody will tell you what an addition really costs. So we did.

Families planning an addition in East Toronto and Durham get vague estimates, per-square-foot guesses, and quotes that hide more than they show. Many spend $15,000–$30,000 on drawings before anyone tells them their real number. Money they don't get back if the answer is no.

After 25+ years and 100+ additions, our knowledge used to live in our heads and our spreadsheets. This guide puts it in yours.

What's inside

The Home Addition Cost Guide 2026

Fifteen pages of real numbers and honest frameworks, built from our database of completed projects.

Inside your copy

15 pages
The honest stay-or-move mathWhat selling and buying again really costs a growing family: the number is bigger than most people think
p. 3
Cost ranges for the 4 most common addition typesSecond storey, rear extension, combined, and side additions, priced from completed projects
p. 5
A completed project budget, published line by lineEvery number from a completed Birch Cliff extension, change orders included: $582,520 net
p. 7
Zoning, explained for homeownersSetbacks, lot coverage, FSI, and when Committee of Adjustment gets involved
p. 8
Three real families & projectsWho they were, what they built, and how it turned out, across East York, East Toronto, and Scarborough
p. 9
5 expensive mistakes and 5 red flags in quotesWhat the too-good number is hiding, and what to demand instead
p. 10
The questions to ask any home builderTen questions that get you past the sales pitch
p. 12
The 12–20 month timelineWork backward from your move-in year: what has to start when
p. 14
Your investmentFree
Emailed to you within five minutes·No sales pitch required to read it

Cost ranges reflect completed and active BVM projects. All projects are different and actual costs vary with scope, site conditions, finishes, and market conditions. The guide is educational and does not constitute a quote.

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From a family who ran the math

"We wanted to stay in the same catchment area for our kids... We have excellent neighbours, and the property still hit all the buttons we wanted. When you worked in everything, the friction costs of moving, the double land transfer in Toronto, closing costs, agent fees, it was a negligible amount between moving or building the house we wanted." Pete · Inwood Avenue, East York · rear extension + second floor addition
Ryan Meagher, Pre-Construction Manager at BVM

Who wrote thisRyan Meagher, Pre-Construction Manager

A note from the Meagher family

My father, Vince, founded BVM in 1997. For 25+ years we've watched good families across East Toronto and Durham struggle to get a straight answer about what their project should cost. This guide is the straight answer: the same numbers and frameworks we use with our own clients, free, before you owe anyone anything.

— Ryan MeagherPre-Construction Manager, BVM Homes

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We design and build across Eastern Toronto, Scarborough, East York, North York, The Beaches, and Durham Region: Pickering, Ajax, Whitby, and Oshawa.

Know your number before you commit a dollar.

The cost ranges, the published $582,520 budget, and the stay-or-move math. Free, in your inbox in five minutes.

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