Ajax, Ontario — basement renovations by Desire Basements

BASEMENT RENOVATIONS · AJAX, ONTARIO

Basement Renovations in Ajax

Luxury basement finishing for Ajax 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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AJAX'S TRUSTED BASEMENT RENOVATION COMPANY

Basement renovation in Ajax, street by street

Ajax's housing stock runs from mature lakeside streets to newer communities in Audley and Nottingham — newer builds bring tall, dry basements ready for finishing, while older homes closer to the lake reward moisture-first construction.

Durham Region's rental demand keeps climbing, and a code-built basement suite in Ajax is one of the area's best income plays. Whatever your starting point, we turn that lower level into finished, livable square footage — and real value added to your Ajax home.

LAKESIDECENTRAL AJAXAUDLEYPICKERING BEACHNOTTINGHAM

10+YEARS

400+GTA BASEMENTS

1POINT OF CONTACT

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

BASEMENT RENOVATION SERVICES · AJAX

What we build in Ajax 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 Ajax families, built with the same crew and warranty as our basements.

EXPLORE HOME RENOVATIONS →

Structural work in Ajax — underpinning and legal second suites

Structural & legal suites

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

EXPLORE STRUCTURAL WORK →

PERMITS & APPROVALS · AJAX

Basement renovation permits in Ajax, handled for you

Ajax requires a building permit for basement finishing and for creating an additional dwelling unit, and Durham-area municipalities register second units once they pass inspection. Suites must meet Ontario Building Code and Fire Code requirements — egress, fire separation, interconnected alarms and ceiling heights. We design to code from day one, file the permit with the town, and manage every staged inspection so the process never lands on your desk.

Drawings & zoning
Prepared and checked for your Ajax 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 AJAX 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.

★★★★★

"They were fast, efficient, and most importantly, the project was completed on time. Kam was fantastic to work with from start to finish — responsive and keeping me informed every step of the way."

KIM B · 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

AJAX BASEMENT QUESTIONS

Answers for Ajax homeowners

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

Yes — finishing a basement in Ajax 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 Ajax?

Yes — under Ontario's updated housing rules, most urban residential lots in Ajax 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 Ajax?

Most professional basement renovations in Ajax 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 Ajax 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 Ajax →

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

KEEP EXPLORING · AJAX

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