We know how basements fail — so 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.




“Amazing team to work with”

“Always answers very quickly”

“Your workers are very clean and careful :)”



“Professionals that made our process simple and smooth”

“Knowledgeable guys, great to work with”

“I definitely recommend Prime and would use them again”



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
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.

Amro, Master Builder PM
How your project runs.
Five steps, no surprises: from the first call to the keys.
- 1
Book a call
A no-pressure consult about your basement and your goals.
- 2
Design & fixed quote
3D renders and an itemized, fixed price, before any work begins.
- 3
Choose your PM
Review résumés and approve who runs your build.
- 4
We build
Daily photo updates, a clean site, on schedule.
- 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.