How much of my time does a garden suite project take?

With a full-service contractor, plan on roughly 10–15 hours of your time across the whole project: a couple of hours up front, 4–6 hours of design and finish selections, about 30 minutes a week during construction, and 2–3 hours at handover. The contractor should handle drawings, engineering, permits, inspections and the build itself.

What do I need to prepare before the first site visit?

Three things: your property survey if you have one (your closing documents often include it — a new one can be arranged if not), a clear idea of who the suite is for (tenant, parents, or adult kids), and a comfortable budget range. Everything else — zoning, measurements, feasibility — is the contractor's job on the visit.

Do I have to deal with the city myself?

Mostly no. You sign the permit application as the property owner, and in some cities like Brampton the finished unit must be registered in your name — your contractor should prepare that paperwork. Chasing the permit, responding to city comments, booking and passing every inspection is the contractor's responsibility.

What happens to my backyard during construction?

Expect a working construction zone for 4–6 months: machine access (often through a removed fence panel), material deliveries, and trenching for water, sewer and hydro between the house and the suite. A good contractor protects the driveway and lawn along the access route and restores the trench line at the end.

Building a Garden Suite: What's Involved for You, the Homeowner (2026)

Raj Renos Inc. · Licensed & WSIB-insured renovation contractor, Brampton · Updated August 2026

The number one thing homeowners tell us before a garden suite project: "I don't have time to manage a construction site." Good news — you shouldn't have to. With a full-service contractor, your total involvement is roughly 10–15 hours spread over the whole project. Here's exactly where those hours go, stage by stage, and what should be handled for you. (For prices and city rules, see our garden suite cost guide.)

Stage 1 — Before anything starts your time: 2–3 hours

Your part: dig out your property survey if you have one (it's often in your closing documents; a new one can be arranged if not), decide who the suite is for — tenant, parents, or adult kids, since that shapes the layout — and settle a comfortable budget range. Many owners fund the build with a HELOC or refinance, and in 2026 ADUs are generally exempt from development charges in Ontario, which helps the math. If a tree sits near the build area (especially in Toronto), flag it early.

Handled for you: the site visit, measurements, zoning review with your city, confirmation of what your lot allows, and one fixed written quote.

Stage 2 — Design & selections your time: 4–6 hours

Your part: approve the layout, then make the fun decisions — flooring, cabinets, counters, tile, fixtures and paint. You shouldn't be sent off to wander showrooms alone: expect shortlisted options that fit the quote, so choosing takes an evening or two, not a month. You'll also sign the building permit application, because cities require the property owner's authorization.

Handled for you: architectural drawings, structural engineering, energy compliance, tree protection plan where required, and the complete permit filing.

Stage 3 — Permits your time: ~0

Your part: stay reachable. That's it. This stage runs 4–12 weeks depending on the city.

Handled for you: responding to city comments, revising drawings if the examiner asks, and chasing the approval. A design that complies with local zoning from day one — no variances — is what keeps this stage short.

Stage 4 — Construction your time: ~30 min/week

Your part: provide backyard access (usually a removed fence panel — the driveway and lawn along the route get protected), keep pets and kids clear of the work zone, join one short weekly update call, and make milestone payments on the schedule written into your contract — never big cash lump sums ahead of work.

Handled for you: everything else. Excavation, foundation, framing, roofing, siding, the utility trenches for water, sewer and hydro back to your house, full interior finish, and every city inspection booked and passed along the way. Expect 4–6 months of an active site — deliveries, trades, some noise — and a restored trench line at the end.

Stage 5 — Handover & after your time: 2–3 hours

Your part: walk the finished suite and note anything on the deficiency list, tell your home insurance provider about the new building (a quick call — it changes your coverage), and if you're renting it out, set up the landlord basics: a standard Ontario lease, tenant screening, and a decision on how to bill utilities. In Brampton, the unit must be registered with the City — the paperwork should be prepared for you, and units elsewhere may need similar registration.

Handled for you: final occupancy sign-off, deficiency fixes, and warranty coverage in writing.

The whole picture

Stage	Your time	Your main jobs
Before it starts	2–3 hours	Survey, purpose, budget range
Design & selections	4–6 hours	Approve layout, pick finishes, sign permit application
Permits	~0	Stay reachable
Construction (4–6 months)	30 min/week	Access, weekly call, milestone payments
Handover & after	2–3 hours	Walkthrough, insurance call, landlord setup

The honest note: if a contractor's plan needs more of your time than this — you're chasing permits, sourcing materials, or coordinating trades yourself — you're not hiring a full-service builder, you're project-managing your own site. That's the single biggest thing to screen for before you sign.

Questions worth asking any builder

Who files and chases the permit? Who books the inspections? Are engineering and utility connections inside the quoted number? What's the payment schedule tied to? Who do I call when I have a question — and is it the same person every time? A full-service contractor answers all five without blinking. For what the project should cost, see our 2026 garden suite cost guide — and if your lot suits a basement unit better, start with the legal basement apartment guide.

Want the 10–15 hour version of this project? That's how we build. Site visit, one fixed written quote, permits and inspections handled, one point of contact, weekly updates — your part stays small.

Call (647) 771-0806. Free, no-obligation estimates across Brampton, Mississauga, Toronto and the GTA.