Tucked between Kingston Road and the Scarborough Bluffs, Guildwood is one of Scarborough’s most distinctive neighbourhoods — known for its mid-century bungalows, split-levels, and mature tree-lined streets. Many of these homes were built in the 1950s and 60s with full basements that were never finished, which means Guildwood is full of untapped living space sitting right under homeowners’ feet.
Renovating a basement in Guildwood comes with its own local considerations: the age and style of the housing stock, the area’s soil and drainage conditions, and City of Toronto permit requirements. Here’s what local homeowners should know.
Basement Renovation Costs in Guildwood
For a typical Guildwood bungalow or split-level, basement renovations generally fall between $35,000 and $80,000, depending on the size of the basement, its current condition, and the scope of work. Legal second suites — which require a separate entrance, full kitchen and bathroom, fire separation, and full permits — cost more, often $80,000 to $120,000+.
What drives the cost in Guildwood specifically? Many of these homes have basements with lower ceiling heights, older electrical panels that need upgrading, and foundations that may need crack repair or waterproofing before finishing begins. A thorough on-site assessment matters more here than in newer neighbourhoods, because the condition of a 60-year-old basement varies enormously from house to house. As with any project, treat published figures as typical ranges — a detailed quote after an in-person visit is the only reliable budget. For a deeper breakdown of what’s included at each price level, see our Scarborough basement finishing cost guide.
Popular Basement Projects in Guildwood
Guildwood homeowners tend to renovate their basements for practical, family-focused reasons:
- Second suites for rental income: With Guildwood’s proximity to the University of Toronto Scarborough campus and good transit access, a legal basement apartment can generate steady rental income. The neighbourhood’s larger lots make separate entrances more feasible than in denser parts of the city.
- Home offices: Many Guildwood professionals work from home at least part-time. A quiet, dedicated office in the basement — with proper lighting and a wired internet connection — beats a corner of the dining room.
- In-law suites: Multi-generational living is common in Scarborough, and a basement suite with a bedroom, bathroom, and kitchenette gives aging parents independence while keeping them close.
- Family and recreation rooms: For growing families, a finished basement adds the playroom, media room, or teen hangout the main floor doesn’t have room for.
Whatever the goal, the layout should suit the home’s structure. Bungalow basements in Guildwood often have support walls and posts that need to stay — a good designer works around them instead of fighting them.
Permits for Basement Renovations in Scarborough
Guildwood falls under the City of Toronto, so basement renovations require a City of Toronto building permit — including framing, insulation, electrical, plumbing, new bathrooms, and especially second suites. Electrical work also needs ESA inspection.
This is particularly important for second suites, which must meet Ontario Building Code requirements for fire separation, sound transmission, egress, and ceiling height. An unpermitted basement apartment can create insurance problems and must be disclosed on resale. When you hire SM Builders for your basement renovation, we handle the entire permit process — drawings, applications, and inspections — so your project is fully compliant.
Why Hire a Local Scarborough Contractor
A contractor who works in Scarborough every day brings local knowledge that’s hard to replicate:
- They know the housing stock. Guildwood’s bungalows and split-levels have predictable quirks — cast-iron drains, 100-amp panels, low basement ceilings, stone or block foundations. A local contractor has seen them all and prices accordingly, without surprises.
- They understand local soil and drainage. Parts of Scarborough sit on clay with a high water table, and the Bluffs area has its own drainage patterns. Waterproofing and moisture strategies should be based on local conditions, not generic advice.
- They know the permit office. Familiarity with City of Toronto’s Scarborough Civic Centre permit process, inspectors, and typical timelines keeps projects moving.
- They’re nearby when you need them. Site visits, warranty service, and quick responses are simply easier with a contractor based in Scarborough.
Frequently Asked Questions
How much does a basement renovation cost in Guildwood?
Most Guildwood basement renovations fall in the typical range of $35,000–$80,000, with legal second suites running higher due to the added kitchen, entrance, fire separation, and permit requirements. Older basements that need waterproofing, electrical upgrades, or ceiling-height solutions can land at the upper end. A free on-site estimate will give you an accurate figure for your home.
Can I build a legal basement apartment in Guildwood?
In many cases, yes. Toronto permits second suites in most residential zones, including much of Guildwood, provided the unit meets building code requirements: minimum ceiling heights, egress windows or doors, fire separation between units, and a separate entrance. Zoning, lot size, and parking rules can affect feasibility, so it’s worth having a contractor assess your specific property before planning around rental income.
How long does it take?
A standard basement renovation typically takes 6–10 weeks of construction once permits are approved, with second suites at the longer end. City of Toronto permit approval can add several weeks before work starts, so plan the overall timeline accordingly — especially if you’re coordinating around a tenancy or a growing family.
Start Your Guildwood Basement Renovation
Your basement could be the most valuable unfinished space in your home — extra room for family, a productive home office, or income from a legal second suite. The first step is a professional assessment of what your basement needs. Get a free estimate from SM Builders, Scarborough’s local renovation contractor, and we’ll give you an honest evaluation and a clear, detailed quote.
Guildwood homeowners can also explore our main basement renovation in Scarborough service page and our Scarborough basement finishing cost guide for 2026 pricing.
