A homeowner in Westboro called us last March, irritated. They had filed a permit for a 250 sq ft kitchen addition four months earlier and had heard nothing back. Their contractor had told them "permits take a few weeks." They had told their neighbour the project would be done by Canada Day.
We pulled the file from MyServiceOttawa and read the deficiency notices. Three rounds. Missing site plan, no SB-12 energy summary, no structural calc on the new beam. The application was sitting on a plans examiner's desk waiting for revisions, and nobody was answering the City's emails.
An addition permit is not slow because of bureaucracy. It is slow because the application was incomplete on day one. Submit it complete, and the City of Ottawa runs through a typical residential addition in 4-10 weeks. Here is the checklist that gets you there.
Stage 1: Site and Survey
Before any drawing happens, the City needs to know the lot. The drawings have to demonstrate that the addition complies with Ottawa Zoning By-law 2008-250, which dictates setbacks, lot coverage, height, and built form.
What you need:
- Property survey or surveyor's real property report (SRPR). If you have one from purchase, dig it up. If not, a new survey is commissioned from an Ontario Land Surveyor. Required when the addition affects setbacks or coverage.
- Lot grading certificate. Required for any addition that changes the building footprint. Sometimes covered by the survey, sometimes a separate fee.
- Tree information. If any tree on the lot or boulevard is within 10 m of the planned addition, a Tree Protection Plan may be required, plus possibly a Tree Permit if the trunk diameter is over 10 cm.
The site information feeds into the site plan that is page one of the permit drawings.
Stage 2: BCIN Architectural Drawings
The architectural drawings are the heart of the application. Per OBC Division C, only a BCIN-qualified designer can stamp them (House category for most additions, Small Buildings for larger projects). The drawings must include:
- Site plan showing lot, existing building, proposed addition, all setbacks dimensioned, lot coverage calculation, building height, drainage
- Existing-condition floor plans, fully dimensioned
- Proposed floor plans, fully dimensioned, with rooms labelled and uses identified
- Elevations of every face that changes (north, south, east, west as needed)
- Building section through the addition, showing wall-floor-roof assemblies and OBC reference numbers
- Wall and roof assembly details with R-value calculations and material call-outs
- Schedule of windows and doors, with sizes, U-values, and any egress notes
- Foundation plan
- Title block on every page with BCIN designer's name, number, category, and signature
What a full BCIN architectural set costs depends on scope: square footage, number of storeys, roof complexity, and how much existing structure has to be documented. A simple bump-out sits at the low end; a multi-storey addition or complex roof at the high end. We provide a detailed written breakdown before any drawing begins. See our architectural plans page for what a real Ottawa permit set looks like.
Stage 3: Structural Design
If the addition involves any of the following, a Professional Engineer (P.Eng) has to design and stamp the structural elements:
- New foundation tied into existing
- Removed or altered load-bearing wall
- Steel beam, LVL beam, or any engineered lumber spanning over 12 ft
- Cantilevered floor beyond standard span tables
- Second-storey addition or significant roof load change
- Soil conditions outside the OBC Part 9 prescriptive scope (high water table, fill, near-surface bedrock)
The P.Eng provides a structural drawing set: foundation details, beam schedule, framing plan, connection details. They also sign a Schedule 1: Designer Information form that goes with the application. What the engineering costs depends on complexity: span lengths, foundation conditions, and how many load paths are altered. See our structural engineering page for what is usually involved.
Stage 4: Energy Calculations (SB-12)
OBC Section 9.36 requires an addition to demonstrate energy compliance. The drawings have to show one of the following on the title block:
- SB-12 prescriptive package number (the table-driven path). Easiest, but inflexible.
- Performance compliance with HOT2000 modelling. Allows tradeoffs between assemblies. Requires a registered energy advisor or a qualified designer to run the model.
The energy summary covers wall R-value, roof R-value, floor R-value, window U-value, door U-value, and the ventilation strategy (HRV/ERV with rated efficiency). The cost of the modelling depends on whether you take the prescriptive path or the performance path with HOT2000.
Stage 5: Schedule 1 and the Application Form
The City of Ottawa application requires several forms, all submitted through MyServiceOttawa:
- Building Permit Application form. Owner information, contractor information, project description, valuation, contact details
- Schedule 1: Designer Information. One per designer, listing their BCIN number and the work they are responsible for
- Schedule 2: Structural Design Information. Where a P.Eng is involved
- Tarion enrolment (for new-construction additions on owner-occupied principal residences, in some cases)
- Conservation Authority approval (if the lot is in a regulated floodplain or wetland area)
- Septic Smart application (if the addition triggers a septic upgrade on a rural lot)
The application fee is $117 minimum, but the actual fee for an addition is calculated by area and project value, payable on submission. The City publishes its current fee schedule on MyServiceOttawa.
Heads up
The City does not accept partial submissions. If any required document is missing, the application is returned without review and the clock does not start. We have seen homeowners lose 6 weeks because they uploaded the survey as a JPEG that did not open in the plans examiner's software. Submit clean files, in PDF, in the right order.
The 4-10 Week Review Timeline
The City of Ottawa publishes target review times. For a typical Part 9 residential addition, the target is 10 business days for first review. Reality, depending on workload and complexity:
- Simple, complete addition under 30 m²: 2-4 weeks first review, often approved on first cycle
- Standard 30-60 m² addition with structural and energy components: 4-6 weeks first review, one revision cycle, total 6-9 weeks
- Complex addition with zoning relief, conservation authority involvement, or septic upgrade: 8-14 weeks total
The single biggest factor in review time is whether the file comes back with deficiencies. A clean file from a designer who has done dozens of Ottawa additions usually goes through with minor comments. A file from a first-time submitter often comes back with 15-30 deficiency items, each one costing a week of back-and-forth.
Inspection Schedule
Once the permit is issued, the work proceeds against a defined inspection schedule. For a typical Ottawa addition:
- Footing inspection. Excavation done, formwork in, before concrete is poured.
- Foundation inspection. Foundation walls in, dampproofing on, before backfill.
- Backfill inspection. Drainage and weeping tile in, before backfill is closed.
- Framing inspection. Walls and roof framed, sheathing on, before insulation.
- Insulation inspection. Insulation in, vapour barrier in, before drywall.
- Drywall inspection. First layer of drywall, fasteners visible, before tape.
- Plumbing rough-in inspection. Drain, waste, vent, and supply rough, before cover.
- HVAC rough-in inspection. Ducts, gas lines, equipment placement, before drywall.
- Final inspection. All trades complete, ESA certificate obtained, smoke alarms tested, before occupancy.
You book inspections through MyServiceOttawa, usually 1-3 business days in advance. Each one is a stop-and-wait gate; if the inspector flags an issue, the work stops until the issue is fixed and re-inspected.
"The permit isn't done when the City stamps it. The permit is done when the inspector signs the final inspection card and writes 'satisfactory.' Anything before that is in progress."
Closing the Permit
The final step homeowners often miss. Once the building inspector signs the final card, you need to:
- Confirm ESA has issued a final electrical safety certificate
- Receive the closing letter from the City confirming permit closure
- File the closing letter with your home records
An open permit on title shows up on every future title search. Insurance companies will ask about it on the next renewal. Buyers' lawyers will flag it. Closing the permit is administrative, but skipping it creates a paper-trail problem that follows the property for decades.
What an Addition Really Costs in Time
Realistic timelines we quote on actual Ottawa home additions:
- Design and drawings: 4-8 weeks
- Permit review and issuance: 6-10 weeks
- Construction: 12-24 weeks (smaller bump-out vs. multi-storey)
- Final inspections and permit closure: 1-2 weeks
Total: 6-11 months from first call to occupancy. Anyone telling you "8 weeks total" for a real addition is either skipping the permit or about to learn an expensive lesson.
For a feasibility check on your specific Ottawa lot, including a same-day zoning review, call 613-862-4555 for a free 48-hour assessment.