How much to gut and reno a Scarborough 1980s home?

A full gut renovation on a 1980s Scarborough home typically runs $150–$350+ per square foot, depending on scope, finishes, and what you find behind the walls. For a typical 1,200–1,800 sq ft bungalow or semi, that puts the total project range anywhere from $180,000 to $630,000 — a wide spread that reflects just how variable these projects can be.

Why 1980s Scarborough Homes Specifically

The good news with 1980s construction is that you're largely past the era of knob-and-tube wiring and asbestos insulation (common pre-1970s). The bad news is that these homes often have aluminum wiring in some circuits, aging 100-amp panels that need upgrading to 200-amp, original polybutylene or galvanized plumbing that's overdue for replacement, and insulation values well below today's Ontario Building Code standards. Budget to address all of these as part of a true gut reno — skipping them now means paying more later.

Post-war bungalows in areas like Scarborough (Agincourt, Malvern, Wexford) were built quickly and to the standards of the day. When walls come down, it's common to find surprises: undersized joists, minimal fire blocking, and moisture damage from decades of inadequate ventilation. A contingency budget of 15–20% on top of your base estimate is not optional — it's essential.

Realistic Cost Breakdown

For a mid-range full gut reno on a 1,400 sq ft Scarborough bungalow, here's roughly how the budget tends to break down:

• Structural/framing repairs: $15,000–$40,000
• Electrical (full rewire + 200A panel upgrade): $18,000–$30,000 (ESA permit required)
• Plumbing (full repipe + fixtures): $15,000–$35,000
• HVAC (new furnace, A/C, ductwork): $12,000–$25,000 (TSSA-certified contractor required for gas)
• Insulation upgrade: $8,000–$18,000
• Drywall, taping, painting: $20,000–$40,000
• Kitchen (mid-range): $30,000–$80,000
• Bathrooms (2, mid-range): $20,000–$50,000
• Flooring throughout: $15,000–$35,000
• Windows/doors (if included): $15,000–$40,000

Permits and Toronto Context

A project of this scale will require multiple permits from the City of Toronto Building Division — building, electrical, plumbing, and HVAC at minimum. Budget $3,000–$8,000 for permit fees alone. Toronto Building can be reached at 416-397-5330 or through toronto.ca/building. Processing times for complex residential projects typically run 6–12 weeks, so factor that into your timeline before demolition begins.

If you're considering adding a basement apartment or secondary suite (common in Scarborough), that triggers additional requirements under Toronto Municipal Code Chapter 150.67 and will add $60,000–$120,000 to the project.

Professional Guidance

A gut renovation is not a DIY project — the combination of electrical, gas, structural, and plumbing work legally requires licensed trades and inspections at each stage. The biggest mistake homeowners make is hiring a general contractor who subs everything to the lowest bidder. Vet your GC carefully: ask for references on similar Scarborough projects, verify WSIB coverage, and confirm all subcontractors are licensed in their respective trades.

Get a minimum of three detailed quotes — not ballpark estimates — before committing. A reputable GC will want to walk the property before quoting anything meaningful.

Browse licensed general contractors and trades in our directory at the Toronto Construction Network to find professionals with experience in 1980s Scarborough home renovations.