Basement Renovation Scarborough: 2026 Cost & Process Guide
Basement renovations in Scarborough cost from $30,000 (family-use rec room finish) to $200,000+ (legal basement apartment with underpinning and separate exterior entrance). Ceiling height, waterproofing scope, and whether you’re building a legal rental suite are the biggest cost drivers. Country Renovations works across Scarborough including Birchcliffe-Cliffside, The Bluffs, Agincourt, West Hill, Rouge, Cliffcrest, Guildwood, Wexford — with City of Toronto (Scarborough community council) permit experience and the HCRA + Tarion compliance stack required for new builds and substantial additions.
Why Country Renovations. Building across Toronto and the GTA — including Scarborough — since 2014. HCRA-registered, Tarion-enrolled for qualifying projects, WSIB-cleared, $5M general liability insured. Free written fixed-price quote in 5 business days. Book a free site visit →
Key Takeaways for Scarborough Homeowners
- Refresh / Good tier: $28,500 – $42,750
- Mid-range / Better tier: $60,562 – $81,937
- Premium / Best tier: $133,000 – $190,000+
- City of Toronto (Scarborough community council) plan review: 10 business days service standard for residential permits
- Scarborough market tier: mid-range
Basement Renovation Services in Scarborough
- Family-use finished basement — $30,000 – $120,000
- Legal basement apartment — $85,000 – $300,000+
- Underpinning to gain ceiling height — $400 – $700 per sq ft of basement
- Egress window cut & install — $5,500 – $9,500 per window
- Basement bathroom rough-in & build — $14,000 – $28,000
- Sump pump + backwater valve install — City of Toronto subsidies available
- STC 50 sound separation (legal apartments) — $3,500 – $8,500
Scarborough Permit & Process Reality
Scarborough’s mid-century housing stock (1960s–80s detached and semi-detached) typically has adequate ceiling height for finished basements without underpinning — making basement projects faster and cheaper than in older Toronto neighbourhoods.
Basement renovation permits in Scarborough are required for any new plumbing, structural work, egress windows, electrical service changes, or creating a new dwelling unit (legal apartment).
For second-suite specifics: as part of Toronto, second suites are subject to Toronto’s Multi-Tenant House and Second Suite Registry — as-of-right in detached, semi, and townhouse dwellings. Country Renovations pulls all permits on your behalf as part of every project — including stamped drawings, structural engineering letters where required, and the AST or municipal portal submission.
Scarborough Basement Renovation Cost Table (2026 CAD)
| Tier | Total Cost (CAD 2026) | Scarborough Notes |
|---|---|---|
| Good / Refresh | $28,500 – $42,750 | Like-for-like scope; minor cosmetic changes |
| Better / Mid-Range | $60,562 – $81,937 | Full scope, mid-range materials, common in Scarborough |
| Best / Premium | $133,000 – $190,000+ | Custom finishes, structural changes, premium materials |
The Country Renovations Process in Scarborough
- Free Site Visit (Day 1). We measure the space, assess existing conditions, and discuss scope at no charge.
- Written Fixed-Price Quote (within 5 business days). Line-itemed proposal — materials, labour, permits, contingency, timeline.
- Design & Selections. Floor plans, finish selections, 3D renderings for premium projects.
- Permits & Engineering. City of Toronto (Scarborough community council) permit submission, structural engineering if required, ESA filing for electrical scope, TSSA for gas.
- Build. Daily check-ins with your project manager. Single accountable point of contact throughout.
- Final Inspection & Handover. Building inspection, ESA pass certificate, complete site clean.
Frequently Asked Questions — Basement Renovation Scarborough
How much does a basement renovation cost in Scarborough in 2026?
A family-use finished basement in Scarborough costs $30,000 – $120,000. A legal basement apartment runs $85,000 – $300,000+ depending on whether underpinning and a separate exterior entrance are required.
Are legal basement apartments allowed in Scarborough?
Yes — as part of Toronto, second suites are subject to Toronto’s Multi-Tenant House and Second Suite Registry — as-of-right in detached, semi, and townhouse dwellings. Compliance with Ontario Building Code Part 9 and Ontario Fire Code Section 9.8 is mandatory regardless of municipality.
How long does a basement renovation take in Scarborough?
A family-use finished basement takes 6 – 14 weeks on site. A legal basement apartment with underpinning takes 27 – 50 weeks total from design to final inspection.
Get a Free Quote in Scarborough
Country Renovations has been delivering basement renovation projects across Scarborough and the GTA since 2014. HCRA-registered. Tarion-enrolled for qualifying projects. WSIB-cleared. $5M insured. Book a free site visit and you’ll receive a written, fixed-price quote with credentials attached in 5 business days.