What does ARU design and permitting include?
It covers everything needed to get a building permit for a secondary unit: a zoning and servicing review, a layout you approve, permit-ready drawings to the Ontario Building Code, the application to the City of Kingston, answers to City comments, and the paperwork for any ARU incentive you apply for.
Our permit checklist
| Stage | What we do | What you get |
|---|---|---|
| Zoning review | Check your zone, setbacks, coverage, parking and constraint maps | A yes, no or "yes, if" answer |
| Servicing review | Check water service size, sewer and hydro capacity | Early warning on costly upgrades |
| Design | Layout options sized to your goal and budget | A plan you sign off |
| Permit drawings | Site plan, floor plans, elevations, sections, details | A complete, code-compliant set |
| Application | Submit and track the permit, answer City comments | An issued building permit |
| Incentives | Help with the Kingston ARU incentive application | A complete application on file |
Why the permit date matters in 2026
Kingston's ARU incentives are now waitlisted, and the City has said only projects with a building permit issued by December 1, 2026 will be considered. Getting a complete permit set in early is the best way to keep that option open. Details are in our Kingston ARU incentive program guide and on the City of Kingston incentive page.
Design for the unit you will actually build
We design with construction cost in mind, because we also build. That means layouts that keep plumbing runs short, use standard material sizes and avoid structural changes you do not need. See how that applies to a garden suite or a basement apartment.
Frequently asked questions
What drawings do I need for an ARU building permit in Kingston?
Typically a site plan, floor plans, elevations, sections and construction details that show Ontario Building Code compliance. Some projects also need structural, mechanical or energy efficiency details. We prepare the full set and respond to any City comments.
Can you just do the design and permit, and I build?
Yes. Some owners hire us for design and permits only and use their own contractor. You get permit-ready drawings and a permit issued in your name. Many later ask us to build as well, but there is no obligation.
What if my lot is in a constraint area?
Some Kingston areas, such as places with sewer capacity limits or natural hazards, do not allow ARUs as of right. A site-specific study or zoning amendment may be possible. We tell you early whether that path is realistic before you spend money on design.
Do I need a permit to legalize an existing unit?
Yes. Kingston requires existing secondary units to be legalized through a building permit, with an inspection that lists any deficiencies. We prepare the drawings for the legalization permit and can complete the work.