$35,000 to $200,000+ depending on scope. A basic basement finish with framing, electrical, drywall, and flooring runs $35K–$65K. Adding a bathroom and wet bar brings it to $65K–$120K. A full legal secondary suite typically costs $120K–$200K. These are 2026 GTA market ranges — your exact cost depends on basement size, ceiling height, existing rough-ins, and finish selections.

Yes — in almost all cases. Finishing an unfinished basement involves framing new walls, adding electrical circuits, and modifying HVAC — all of which require building permits under the Ontario Building Code. A secondary suite additionally requires an ESA permit, fire separation compliance, and City of Toronto second suite registration. Spartan manages all permit applications, submissions, and inspection scheduling. You don’t chase the city. We do. For permit information visit City of Toronto Building Permits.

6 to 16 weeks from permit approval to handoff. A basic finish (no bathroom, no kitchen) typically runs 6–8 weeks once permits are in hand. A full finish with bathroom runs 8–12 weeks. A legal secondary suite with full compliance typically runs 12–16 weeks. The main variable is permit processing time — Toronto building permits currently take 4–8 weeks for residential projects. Spartan submits early so permits don’t delay your start date.

A legal second suite in Toronto must comply with the Ontario Building Code and the City of Toronto’s Second Suite By-law. Key requirements include: a separate entrance, minimum ceiling height (generally 6’6”), at least one egress window in every sleeping room, 5/8” Type X drywall fire separation between the suite and the main dwelling, a dedicated electrical panel or sub-panel with ESA inspection, an HRV or ERV for ventilation, and City of Toronto second suite registration. Spartan prepares and submits the full compliance package. An illegal basement apartment creates significant liability — insurance issues, fines, and potential evacuation orders. Build it right once.

Yes — but moisture must be addressed before any framing or insulation. Spartan assesses moisture conditions during the site visit: we check for efflorescence (salt deposits on concrete), active seepage, foundation cracks, and high humidity levels. Depending on severity, solutions range from interior drainage membranes and sump pump upgrades to foundation crack injection or exterior waterproofing. Insulating over a wet wall traps moisture and causes mold. We address the source first, then build.

Change orders are rare because the scope is comprehensive from day one. When legitimate site conditions require adjustment — unexpected plumbing configurations, hidden structural elements, or additional waterproofing requirements — we document immediately, present clear options with transparent pricing, and proceed only with your written approval. No invoice surprises.

Yes — and most clients do. The basement is sealed off from the rest of the home with dust barriers during demolition and framing. There is typically no disruption to the main floors except during HVAC and electrical work, which requires brief access to the panel and mechanical room. The noisiest work (demo, framing, concrete cutting for drain rough-ins) is front-loaded into the first 1–2 weeks. After rough-ins are closed and drywall starts, it becomes manageable.

The ClearScope™ basement takeoff covers every division of work — demolition, waterproofing, framing, insulation, electrical, plumbing, HVAC, drywall, flooring, millwork, doors, trim, paint, and fixtures. Every line item includes quantity, unit of measure, labour and material cost breakdown, and clear inclusions/exclusions. You receive the full spreadsheet plus marked-up drawings. The takeoff is the foundation of your fixed-price proposal — nothing moves forward until the numbers are real. Submit your drawings for a ClearScope™ basement takeoff →