Markham, Ontario — basement renovations by Desire Basements
BASEMENT RENOVATIONS · MARKHAM, ONTARIO

Basement Renovations in Markham

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

Get a Free Quote →VIEW OUR PROJECTS
MARKHAM'S TRUSTED BASEMENT RENOVATION COMPANY

Basement renovation in Markham, street by street

Newer communities like Cornell, Cathedraltown, Berczy and Wismer feature tall, dry basements built for finishing, while mature streets in Unionville, Milliken and Markham Village reward the moisture-first approach our crews build into every project.

Markham is also one of the GTA's strongest rental markets, and since provincial housing changes opened the door to up to three units on most urban lots, a registered basement suite here is both legal and lucrative. Whatever your starting point, we turn that lower level into finished, livable square footage your family uses every day — and real value added to your Markham home.

UNIONVILLECORNELLBERCZYWISMERMILLIKENCATHEDRALTOWN
10+YEARS
400+GTA BASEMENTS
1POINT OF CONTACT
Basement media wall with electric fireplace — basement renovation in Markham by Desire Basements
PERMITS & APPROVALS · MARKHAM

Basement renovation permits and second-suite registration in Markham, handled for you

Markham has a two-step system: a building permit (or change-of-use permit) for the construction, and then registration of the two-unit house with the city — including a fire inspection by Markham Fire & Emergency Services. Historically Markham restricted basement apartments in many areas, but provincial changes now allow up to three units on most urban residential lots, and the city registers compliant suites. We build to Building Code and Fire Code, coordinate the fire inspection, and walk the registration through with you — so your suite is not just finished, it is registered and legal.

1

Drawings & permit
Prepared and filed for your Markham address

2

Built to Code
Building Code and Fire Code compliant construction

3

Fire inspection
Coordinated with Markham Fire & Emergency Services

4

Registration
Two-unit house registered with the city

INCLUDED WITH EVERY MARKHAM 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 MARKHAM HOMEOWNERS INVEST · REAL PROJECT DATA
$89,000MEDIAN PROJECT IN MARKHAM
$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.

A real basement we finished in Markham

Tap to watch the walkthrough — a 40-year-old basement fully gutted and rebuilt.

Basement renovation walkthrough in Markham, Ontario by Desire Basements
CHAT WITH KAM · WHATSAPP