Basement Renovation Newmarket

MARKHAM · UNIONVILLE · CORNELL · BERCZY · CATHEDRALTOWN

Basement Renovation Newmarket

Finished basements and legal secondary suites across Newmarket — design, permits, waterproofing, framing, bathrooms and full finishing, handled end to end by one team at Razco Renovation.

Get a Free Quote — (647) 561-3333
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Permits & Code Handled
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Waterproofing Done Right
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Licensed & $2M Insured
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1-Year Workmanship Warranty

What We Do in Your Newmarket Basement

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Basement Finishing
Framing, insulation, drywall, flooring, pot lights and trim for a warm, modern living space.
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Legal Basement Apartments
Income-generating second suites built to the Ontario Building Code — separate entrance, egress, fire separation, kitchen and bath.
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Basement Bathrooms
Full three-piece basement bathrooms — proper drains, waterproofing and ventilation.
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Basement Kitchens & Wet Bars
Kitchenettes and wet bars for suites and rec rooms — cabinetry, plumbing and appliances.
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Waterproofing & Moisture Control
Interior waterproofing, sump pumps, vapour barriers and insulation to keep the space dry.
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Egress Windows & Underpinning
Code-compliant egress windows, plus underpinning to gain legal ceiling height.

Our 6-Step Basement Process

1
Free Assessment & Quote
We check ceiling height, moisture and layout, confirm what Newmarket allows, and give you a clear quote.
2
Design & Permits
Code-compliant drawings prepared and the building permit obtained before any work begins.
3
Waterproofing & Framing
We address moisture, then frame, insulate and vapour-barrier the space into a warm, dry shell.
4
Rough-In
Plumbing, electrical and HVAC roughed in for bathrooms, kitchens and lighting, then inspected.
5
Finishing
Drywall, flooring, trim, doors, pot lights and paint bring the basement to a clean, modern finish.
6
Walkthrough & Inspection
We pass final inspections, walk the space with you and hand over your warranty.

What Does a Basement Cost in Newmarket?

Most finished basements in Newmarket run $40,000–$100,000 (about $35–$75 per sq ft). A legal second suite costs more — around $90–$140 per sq ft — but can earn $1,500–$2,500+ per month in rent.

See the full 2026 basement cost breakdown →

Basement Renovation Newmarket FAQ

How much does a basement renovation cost in Newmarket?
Most basement renovations in Newmarket cost $40,000 to $100,000 in 2026, about $35 to $75 per square foot, or $90 to $140 per square foot for a legal apartment.
Can you build a legal basement apartment in Newmarket?
Yes — we build legal second suites to the Ontario Building Code: separate entrance, egress windows, fire separation, and a full kitchen and bath, and can help with Newmarket second-suite registration.
Do I need a permit to finish a basement in Newmarket?
Yes — finishing a basement, adding a bathroom or building an apartment all require a permit. Razco prepares the drawings and handles the permit and inspections.
How long does a basement renovation take?
A standard finished basement takes about 4 to 8 weeks; legal suites and underpinning take longer.
Do you handle waterproofing and moisture issues?
Yes — we waterproof, install vapour barriers and insulation, and can add a sump pump so your basement stays dry and healthy.

Start Your Newmarket Basement — Free Quote

Finishing & legal suites across Newmarket, Unionville, Cornell & the GTA. Itemized pricing, 1-year workmanship warranty.

(647) 561-3333

Basement Renovation Newmarket — Local, Licensed & Insured

Razco Renovation has spent 10+ years renovating homes across Newmarket, a growing family town blending established neighbourhoods with newer subdivisions. From finished family basements to legal in-law and rental suites, we handle waterproofing, egress windows and permits — all managed in-house and backed by our 1-year workmanship warranty. We work throughout Newmarket, including Stonehaven, Summerhill, Glenway, Woodland Hill and Bristol-London, and handle the local permit process for you.

Explore More in Newmarket

All work is completed to the Ontario Building Code and local municipal permit requirements.