We know how basements failso we build ones that don't.

25 years of experience across the GTA, including flood restorations on what goes wrong beneath your home. We provide expert basement renovations knowing exactly what fails and how to stop it.

Our work200+ projects
25 years of experienceTrusted on projects for
Shoppers Drug MartIntegraconMountain View Building Group
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Amazing team to work with
Client review
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Always answers very quickly
Client review
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Your workers are very clean and careful :)
Client review
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Professionals that made our process simple and smooth
Client review
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Knowledgeable guys, great to work with
Client review
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I definitely recommend Prime and would use them again
Client review
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Sam, Founder and Project Manager at Prime Developments
Sam, Founder and PM

Accountability you can put a face to.

Pick your project manager

Review résumés and approve who runs your build before we start.

Fixed-price promise

The quote is the price you pay. No hidden fees, no surprises.

Licensed & WSIB-insured

Licensed, insured, certified trades on every job.

Permits in your name

We handle every permit and file it in your name.

Two ways to build. One standard of work.

Every project includes all seven of our standards. Diamond stacks the top of our craft on top.

Essential

A quality, code-right finished basement, built to our full standard.

  • A vetted project manager you choose
  • Essential moisture control
  • Solid, durable standard finishes
  • 3D renders before we build
  • Fixed, itemized pricing
Premium

Diamond

Everything in Essential, plus the top of our craft.

  • Master Builder PM ($1M+ in completed jobs)
  • Comprehensive dry-basement waterproofing system
  • Premium lighting design & finishes
  • Enhanced photorealistic renders
  • White-glove service & priority scheduling

Free resources provided

A quick video call about your basement.

We walk through what is possible in your space and send you resources you can keep. Yours to use whether or not you build with us.

See what we've built.

Every job we've completed across the Greater Toronto Area, mapped pin by pin. The proof is underground.

View completed projects
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Amro, a Master Builder Project Manager at Prime Developments, on a Toronto high-rise job site

Amro, Master Builder PM

How your project runs.

Five steps, no surprises: from the first call to the keys.

  1. 1

    Book a call

    A no-pressure consult about your basement and your goals.

  2. 2

    Design & fixed quote

    3D renders and an itemized, fixed price, before any work begins.

  3. 3

    Choose your PM

    Review résumés and approve who runs your build.

  4. 4

    We build

    Daily photo updates, a clean site, on schedule.

  5. 5

    Walkthrough & handover

    We hand you a finished basement, done right.

Common questions.

Yes, the Fixed-Price Promise. The number we quote is the number you pay. Anything we miss, we eat, not you.

Yes. Before work starts you're sent your project managers' résumés, and you approve who runs your build, before we lift a hammer.

It's what we specialize in. We build moisture-first, and the Diamond tier includes a comprehensive dry-basement waterproofing system.

Yes. We file every permit in your name, so your basement stays fully compliant.

Yes. A legal secondary suite is a Diamond specialty: a real extra floor that adds value to your home.

Proudly serving the Greater Toronto Area

  • Toronto
  • Mississauga
  • Etobicoke
  • Vaughan
  • Markham
  • Richmond Hill
  • Oakville
  • Brampton
  • North York
  • Scarborough

Ready to build a basement that lasts?

Book a call and we'll give you a fixed, itemized quote, plus the 3D renders to go with it.