Legal Second Unit Contractor in the GTA | GSR Basements
☀ SUMMER SPECIAL — Free permit + architect plans on any basement signed before July 31, 2026.
Legal Second Unit Specialists — GTA

Legal second units built on time, on budget — or we pay you $4,000.

Most GTA homeowners spend months chasing contractors who miss deadlines, blow budgets, and cut corners on permits. With GSR you get a fixed price, a fixed timeline, and a written guarantee — before we break a single wall.

See Our Work
💳 As low as $600/mo · financing available
Muhammad's Legal Second Unit
Brampton, ON · Fully permitted & rent-ready
$4,000
On-time guarantee
⭐
4.7 ★ Google
Verified reviews
📋
Permit-Ready
100% Code Compliant
🛡️
WSIB Insured
Licensed Contractor
🏆
$4,000 Guarantee
On time & on budget
Sound Familiar?

Why most GTA homeowners struggle to find a second-unit contractor they can trust.

You're not imagining it. The GTA renovation industry has a reputation problem — and homeowners pay the price.

01Problem #1

The contractor who promises everything — then disappears

They show up for the first week, then the calls stop. You're left with a half-framed basement, a paid deposit, and every week another $500 you're not collecting in rent.

02Problem #2

The quote that doubles before the project ends

You agreed to $42,000. By the time drywall is up, the invoice is $68,000. "Unforeseen conditions." You feel stuck — too far in to walk away.

03Problem #3

The permit nightmare nobody warned you about

Your contractor skipped or botched the permits. Now the city is involved, inspections are failing, and your 12-week project is sitting at month 8 with no legal unit to rent.

04Problem #4

Quality that looks fine until it doesn't

The unit passes inspection. Six months later — cracks in the drywall, water through the bathroom, a tenant withholding rent. Your contractor? Nowhere to be found.

The GSR Difference

The second-unit contractor that actually does what it says.

Our #1 Commitment to You

Finished on time & on budget. Or we pay you $4,000.

Before we break ground, you get a fixed timeline and a fixed price — both in writing. If we miss your deadline or go a single dollar over budget, we pay you. No fine print. No exceptions.

$4,000
Paid to you

*Subject to the terms of your signed contract.

📐 Full Design Package Included
Floor plans, permit drawings, and material selections included with every project. No extra fees.
🛡️ 3-Year Workmanship Warranty
Every finish and detail is covered. If something's not right, we come back and fix it.
💧 Bathroom Leak & Mold Guarantee
All bathroom and wet-area work protected against leaks and mold — long-term peace of mind.
💳 As Low As $600/mo Financing
Start now and pay over time. Your future tenant's rent can help cover the monthly payments.
Real Clients, Real Stories

Hear it from our homeowners.

🔊 Tap to play with sound
Israel
Legal Second Unit — Brantford, ON
Verified
Verified Reviews

What homeowners say on Google.

Featured Project
Finished living room in Muhammad's legal second unit basement
Living Room
Finished kitchen in Muhammad's legal second unit basement
Kitchen
Finished bedroom in Muhammad's legal second unit basement
Bedroom
Finished bathroom in Muhammad's legal second unit basement
Bathroom
MuhammadClient
Brampton, ONLocation
Full Gut & FinishScope
View all projects →
What's Included

Everything your legal unit needs — no hidden extras.

✓
Permit & Architectural Drawings
Full permit submission and management — you never touch a form.
✓
Fire Separation
All code-required assemblies, egress windows, and fire-rated materials.
✓
Separate Entrance
Side or rear entrance for full tenant privacy and legal compliance.
✓
Electrical (ESA-Compliant)
Separate panel, pot lights, outlets, and interconnected smoke alarms.
✓
Plumbing Rough-In & Finish
Full kitchen, bathroom, and laundry plumbing by licensed trades.
✓
Flooring, Paint & Trim
LVP, tile, or carpet — your choice. Baseboards and casing throughout.
Simple Process

How it works — start to legal unit.

1
Free & no pressure

15-Minute Phone Call

We talk through your goals, the space you have, and rough ballpark pricing. No obligation, no sales pitch.

2
Your home, your quote

Free Site Visit & Fixed Quote

We visit, measure, and give you a fixed price and completion date — locked in writing before a single nail.

3
Guaranteed delivery

We Build It. On Time.

We handle permits, trades, and inspections. You get a fully legal, rent-ready unit — exactly as quoted, or we pay you $4,000.

Watch & Learn

Get answers before you book a call.

Two short videos covering the build process and what actually drives the cost of a legal second unit.

🔊 Tap to play with sound
How a Legal Second Unit Comes Together
Inside the build — steps, trades & decisions
🔊 Tap to play with sound
What Actually Drives the Cost
Honest pricing — no surprises at the site visit
From $600 / month

Most GTA legal units rent for $1,500–$2,000 a month.

Every month you wait is money left on the table. Flexible financing through Financeit means your future tenant's rent can help cover the payments.

See financing options →
Starting from
$600/mo
No prepayment penalty · quick approval
Common Questions

Questions we get every day.

Most projects take 10–16 weeks from permit approval, depending on scope. We lock in your completion date in writing — and we're on the hook for $4,000 if we miss it.

Yes — completely. We submit the permit, manage the process, and pass all city inspections. You don't touch a single form. Every unit is built to Ontario Building Code.

Most GTA projects fall between $50,000–$95,000+ depending on size and finishes. Fill out our form and we'll give you a rough range for your specific home — no commitment.

We pay you $4,000. It's written into your contract before we break ground — an actual financial commitment that keeps us fully accountable.

Stop losing $2,000 a month. Let's build your legal unit.

Answer 5 quick questions and get a rough estimate. We take on 4–6 new projects per month — now booking — limited spots this season.

Free phone consultation · Fixed-price quote · $4,000 on-time guarantee · GTA-wide
GSR Basements — Legal Second Unit Contractor. Serving homeowners across the Greater Toronto Area including Brampton, Mississauga, Etobicoke, Toronto, North York, Oakville, Vaughan, and Caledon. All legal second units are fully permitted and built to Ontario Building Code.