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Diamond Hammer Construction

Basement Finishing

A finished basement is one of the highest-value renovations you can make. We build code-compliant basement finishes across Vaughan and the GTA — rec rooms, home theatres, gyms, in-law suites, and basement apartments with proper egress, insulation, and moisture control.

What's included

  • Code-compliant framing, insulation, and vapour barrier
  • Egress windows and separate entrances
  • Basement apartments and in-law suites
  • Home theatres, gyms, and rec rooms
  • Full electrical and plumbing coordination

Our process

We assess moisture, ceiling height, and egress requirements first, then design a layout that maximizes your space and meets Ontario building code — with permits pulled and inspections scheduled on your behalf.

Open-concept finished lower-level living space concept
Modern finished basement kitchenette concept for an in-law suite

Request a free quote

Tell us about your basement finishing project and we'll follow up within one business day.

Get StartedOr call (289) 807-3259

Basement Finishing available across the GTA

Select your city for local details on basement finishing.