Oshawa, Ontario — basement renovations by Desire Basements

BASEMENT RENOVATIONS · OSHAWA, ONTARIO

Basement Renovations in Oshawa

Luxury basement finishing for Oshawa homes — free 3D design, itemized fixed pricing, lifetime warranty, and a written timeline backed by our $200-per-day on-time guarantee.

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OSHAWA'S TRUSTED BASEMENT RENOVATION COMPANY

Basement renovation in Oshawa, street by street

Oshawa mixes century homes south of King Street with brand-new subdivisions in Kedron and Windfields. Older basements downtown often need moisture work and egress upgrades before finishing, while the newer builds up north finish quickly into theatres, gyms and family space.

With Ontario Tech and Durham College driving constant rental demand, a registered basement apartment in Oshawa is one of the strongest income plays in Durham Region. Whatever your starting point, we turn that lower level into finished, livable square footage — and real value added to your Oshawa home.

DOWNTOWN OSHAWANORTH OSHAWAKEDRONWINDFIELDSLAKEVIEWSAMAC

10+YEARS

400+GTA BASEMENTS

1POINT OF CONTACT

Basement media wall with navy built-ins and marble — basement renovation in Oshawa by Desire Basements

BASEMENT RENOVATION SERVICES · OSHAWA

What we build in Oshawa basements

Basement finishing

Theatres, bars, gyms and family spaces — metal studs and moisture-resistant drywall as standard, finished to match the rest of your home.

EXPLORE BASEMENT FINISHING →

Home renovations

Kitchens, bathrooms and whole-home updates for Oshawa families, built with the same crew and warranty as our basements.

EXPLORE HOME RENOVATIONS →

Structural work in Oshawa — underpinning and legal second suites

Structural & legal suites

Underpinning for ceiling height, waterproofing, and permitted separate entrances for legal Oshawa second suites.

EXPLORE STRUCTURAL WORK →

PERMITS & APPROVALS · OSHAWA

Basement renovation permits in Oshawa, handled for you

Oshawa requires a building permit before a basement is finished or converted into an additional residential unit, and two-unit houses must be registered with the city. In the rental-licensing zone near the universities, an additional Residential Rental Housing Licence applies — something we confirm for your specific address before drawings are filed. We prepare the plans, pull the permit, and manage every inspection to final sign-off.

Drawings & zoning
Prepared and checked for your Oshawa address

Permit filed by us
Submitted and tracked — you never stand in line

Staged inspections
Framing, insulation, ESA electrical, plumbing

Final sign-off
Closed permit, documented for resale

INCLUDED WITH EVERY OSHAWA ESTIMATE

A free 3D design of your finished basement

Walk through your basement room by room — move walls, try finishes, see your exact space — and approve every detail before construction begins.

★★★★★

"A phenomenal experience right from the start. We had no delays and the craftsmanship was top tier! Also the 3D renderings really help to envision the space. Highly recommend!"

SARAH BACCHUS · GTA HOMEOWNER · ✓ GOOGLE REVIEW

THE DESIRE GUARANTEES

Built on trust, backed in writing

10+YEARS OF EXPERIENCE

A decade of basement renovations across the GTA — owner-led on every single project.

LifetimeWARRANTY COVERAGE

Every project, every material, every detail — warrantied for the life of the house.

$200/dayON-TIME GUARANTEE

Your quote includes a written timeline. If we miss it, we pay you $200 for every late day.

WHAT GTA HOMEOWNERS INVEST · REAL PROJECT DATA

$103,000MEDIAN PROJECT ACROSS THE GTA (2024–26)

$55/sq ftPROJECTS START FROM

$60–150KMOST GTA PROJECTS FALL WITHIN

From our 2026 GTA Basement Cost Report — built from the signed contract values of our completed projects.

See the full report → Estimate my basement

OSHAWA BASEMENT QUESTIONS

Answers for Oshawa homeowners

Do I need a building permit to finish my basement in Oshawa?

Yes — finishing a basement in Oshawa requires a building permit, with staged inspections for structural, framing, insulation, electrical and plumbing work. Desire Basements prepares the drawings, files the application, and manages every inspection through final sign-off.

Can I add a legal basement apartment in Oshawa?

Yes — under Ontario's updated housing rules, most urban residential lots in Oshawa can now have additional residential units, including a basement suite, subject to local zoning. Suites must meet Building Code and Fire Code requirements for ceiling height, fire separation, egress and alarms — we design and build to full code and handle the approvals end to end.

How much does a basement renovation cost in Oshawa?

Most professional basement renovations in Oshawa start around $55 per square foot and up — a 1,000 sq ft project starts in the $55,000 range with standard finishes. Across the GTA, the median project in our 2026 Cost Report is about $103,000. Every Desire quote is itemized line by line and locked before you sign, and includes a free 3D design of your finished basement.

Ready for your Oshawa basement renovation?

Book a free in-home consultation — we'll measure your space, talk through your vision, and bring a 3D design with your itemized basement renovation quote.

Get a Free Quote in Oshawa →

FREE 3D DESIGN · LIFETIME WARRANTY · $200/DAY ON-TIME GUARANTEE

KEEP EXPLORING · OSHAWA

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