How Much Does a Garden Suite Cost in Toronto? (2026 Breakdown)

A Toronto garden suite costs $275,000–$550,000 all-in for a 400–1,076 sq ft build, or roughly $400–$650 per square foot in 2026. The City of Toronto permit is only $644, but utility connections, arborist reports, and engineering drawings add another $25,000–$70,000 before construction begins. Smaller suites cost more per square foot, not less.

The real all-in cost by size

Most Toronto builders publish a per-square-foot number without the soft costs around it. Here is what a finished, occupancy-ready garden suite actually totals in 2026:

• 400–500 sq ft (studio or 1-bed compact): $225,000 low, $275,000 typical, $325,000 high
• 500–645 sq ft (1-bed standard): $275,000 low, $327,000 typical, $450,000 high
• 700–1,076 sq ft (2-bed, at bylaw maximum): $350,000 low, $400,000 typical, $550,000+ high

The 1,076 sq ft figure is the City of Toronto default bylaw cap — Zoning By-law 569-2013 limits garden suites to 100 square metres of gross floor area and 6.0 metres in height. Two-storey builds and lots with variance approvals can reach 1,200 sq ft of combined floor area.

Why smaller suites cost more per square foot

This is the single most misunderstood number in garden suite pricing. A 400 sq ft suite runs $600–$700/sq ft. A 1,000 sq ft suite runs $400–$500/sq ft. The fixed costs — permit fees, utility connections, the kitchen, the bathroom, the foundation, the engineering drawings — do not shrink when you shrink the footprint. They divide across fewer square feet, so the per-unit cost goes up.

For homeowners whose lot can support it, building to (or beyond) the default bylaw cap is usually the lowest-per-square-foot option. The extra build cost is offset by a higher rental unit in a two-bedroom or two-storey configuration.

Soft costs: the $25K–$70K most people miss

The City of Toronto building permit for a garden suite is $644.38 as of 2026 (or $214.79 minimum for the smallest projects). That number shows up in blog after blog as "the permit cost." It is not. The real pre-construction total, when you add everything the City and your lender require, looks like this:

• Building permit (City of Toronto): $644.38 fixed
• Architectural drawings: $8,000–$15,000
• Structural engineering review: $2,000–$6,000
• Site survey: $1,000–$4,000
• Arborist report: $400–$1,500 (required if trees on site or adjacent)
• Utility connections (water, sewer, electrical): $15,000–$50,000 — this is the big one

Development charges are zero. The City of Toronto exempts garden suites (and laneway suites, and up to six-unit conversions) from all development charges under the current housing initiative. This is one of the few unambiguous financial wins in the process.

Total realistic soft costs before a framer shows up: $25,000 to $70,000.

Hard construction costs (per square foot, 2026)

• Base shell — foundation, framing, roof, windows, rough-in MEP: $400–$600/sq ft
• Interior finishes — drywall, flooring, paint, trim: $60–$120/sq ft
• Kitchen and bathroom: $40–$80/sq ft, or $12,000 (basic) to $25,000 (mid-range) for both combined
• Landscaping and exterior: $20–$40/sq ft

Flooring choice is the single biggest finish variable: luxury vinyl plank runs $5–$7/sq ft installed, ceramic or porcelain tile runs $15–$30/sq ft installed. On a 600 sq ft suite, that is a $5,000–$15,000 swing.

Skylights add $1,000–$2,000 per opening, installed. On suites with shared walls to the main house, expect to add acoustic mineral wool and double-layer drywall — budget an extra $3,000–$8,000.

Rental income: what Toronto garden suites actually command in 2026

Two different data sources are in circulation, and the difference matters:

• CMHC Rental Market Report (October 2025, purpose-built rental market, older stock): Toronto 1-bedroom median $1,761/mo, studio $1,491/mo, 2-bedroom $2,045/mo.
• Rentals.ca asking-rent data (March 2026): Toronto average $2,498/mo across all unit types, down 5.1% year-over-year.

Garden suites are new-build, detached, and command a premium over the CMHC purpose-built average. Konstruction Group delivered projects have achieved:

• $3,000–$3,300/mo for a standard 2-bedroom 600–750 sq ft garden suite in desirable Toronto neighbourhoods
• Up to $4,800/mo for larger two-storey builds approaching 1,200 sq ft of combined floor area

A rough payback calculation: on a $400,000 build renting for $3,200/mo, you are looking at roughly 130 months of gross rent (about 11 years) before any financing costs, vacancy, maintenance, or property tax increase. A 1,200 sq ft two-storey at $4,800/mo narrows that to roughly 104 months (under 9 years). Most owners finance 75–80% via a Home Equity Line of Credit or insured refinance, so the equity payback is faster but the cash flow is slimmer.

Timeline: how long does a Toronto garden suite actually take?

• Design and drawings: 4–6 weeks
• City of Toronto permit review (standard submission): 6–10 weeks; 8–16 weeks in practice
• City of Toronto permit review (pre-approved plans): 6–8 weeks — faster because the drawings are already City-approved
• Committee of Adjustment (only if a variance is needed): add 3–6 months
• Heritage district review (only in designated areas): add 4–6 weeks
• Construction (400–600 sq ft): 3 months
• Construction (700–1,076 sq ft): 4–8 months

Realistic total for a straightforward build with no variance: 9 to 12 months from first drawing to occupancy.

If the lot needs a minor variance or sits inside a heritage conservation district, plan for 12 to 18 months.

The cancelled federal loan program everyone still cites

This is a real trap in 2026. You will still see blog posts from 2024 and 2025 referencing a Canada Secondary Suite Loan Program — an $80,000 loan at 2% interest over 15 years. That program was announced in late 2024, scheduled to launch in 2025, and then cancelled in the 2025 federal budget before it took a single application.

It is not active. It is not coming back in its original form. If a contractor or realtor is quoting your garden suite ROI with that loan in the math, the math is wrong.

Programs that are still active in 2026:

• CMHC Insured Refinance for Secondary Suites (effective January 15, 2025) — allows refinancing up to 90% loan-to-value when building a secondary suite on owner-occupied property
• Toronto Development Charge exemption — $0 in DCs for garden suites
• City of Toronto pre-approved plans (launched 2025) — free standardized drawings that cut permit approval time

How Konstruction Group prices garden suites

We give homeowners a line-item quote that separates:

• Hard construction (framing, insulation, and drywall/finishes — the three trades we self-perform, priced at $400–$500/sq ft for a standard 600 sq ft suite)
• Trade subcontracts (electrical, plumbing, HVAC, roofing, windows — scoped to local code and passed through at cost plus coordination)
• Soft costs (permit, survey, drawings, engineering, arborist, utility connections — shown as pass-through line items, not bundled)
• Contingency (10–15% on renovation projects, 5–8% on new garden suite builds)

If another builder quotes you a single per-square-foot number with nothing itemized, ask for the breakdown. The delta between "cheapest quote" and "most expensive quote" on a Toronto garden suite is usually not the shell cost — it is what was left out of the smaller number.

Next steps

If you are weighing whether a garden suite makes financial sense on your specific lot:

1. Check your lot against the City of Toronto garden suite zoning guide — not every lot qualifies, and the setback rules knock out smaller Toronto lots entirely.
2. Get a survey if you do not have one newer than five years. It is the first thing any builder will ask for.
3. Get two or three itemized quotes. Compare the soft-cost lines, not just the per-square-foot headline.

Request a free detailed garden suite quote from Konstruction Group — we provide a line-item breakdown scoped to your lot and the current City of Toronto bylaw.