What architectural drawings cost for an Ottawa renovation depends entirely on what you actually need. The range is wide because "drawings" means very different things: a permit-only set for a basement finish is a fraction of the work behind a full design-build set for a custom addition.
This piece walks through the four real tiers of drawings by what each one includes, the difference between a BCIN designer and an architect (and when you need each), what's actually in a drawing package, and the line items where homeowners overpay.
The four tiers of drawings we actually deliver
Tier 1: Permit-only basement finish
The minimum drawings the City of Ottawa accepts for a basement finishing permit. Floor plan showing existing and proposed walls, electrical layout, mechanical layout, framing details, egress window locations, fire-rated assembly callouts. Usually 4-6 pages. BCIN designer required (qualified to small-buildings registration).
What's included:
- Existing floor plan as-found
- Proposed floor plan with wall locations and dimensions
- Electrical layout (receptacles, switches, lighting, smoke/CO alarms)
- Plumbing layout if a bathroom is included
- Framing details and structural callouts
- Code references and BCIN stamp
Tier 2: Permit-only addition or interior reno
Drawings for a single-storey addition under 600 sq ft, or a kitchen-and-bath gut renovation. Includes site plan, existing and proposed floor plans, exterior elevations (4 sides), building section, key details, structural framing plan. Usually 8-12 pages.
Tier 3: Full design-build set
Drawings for a 2-storey addition, second-storey addition, or full custom home. Site plan, existing and proposed floor plans for every level, all exterior elevations, multiple sections, detailed framing plans, foundation plan, roof plan, electrical plan, mechanical plan, schedules (windows, doors, finishes), key construction details. Usually 18-25 pages. BCIN designer or architect.
Tier 4: Architect-led custom design
Used for large custom homes, commercial projects, or heritage projects requiring a licensed architect (OAA-stamped drawings). Includes everything in Tier 3 plus 3D renderings, interior elevations, custom millwork details, full specification book, possibly multiple design iterations. Architects bill either by the hour or as a percentage of construction cost, which is why this tier is the most expensive of the four.
BCIN designer vs architect: when do you need each?
The Ontario Building Code allows two types of professionals to design and stamp drawings for residential projects:
BCIN designer (Building Code Identification Number)
A designer registered with the Ministry of Municipal Affairs and Housing under the Small Buildings category, qualified for residential projects up to 3 storeys and 600 sq m (about 6,500 sq ft). Most Ottawa renovations and additions fall here.
A BCIN designer typically works to a fixed fee per project and is the less expensive of the two routes. Most renovation drawings are done by BCIN designers.
Architect (OAA-licensed)
A member of the Ontario Association of Architects, required for buildings over 600 sq m or for any project where the client wants the architect's services and stamp.
An architect bills by the hour or as a percentage of construction cost, which makes this the more expensive route. Required for projects above the small-buildings threshold and projects with complex commercial/institutional scope.
Most Ottawa homeowners doing an addition, basement, or kitchen reno don't need an architect. A BCIN designer is qualified, less expensive, and produces drawings the City of Ottawa accepts. We use BCIN designers in-house for the majority of our architectural plans in Ottawactural plans in Ottawa work.
What's actually in a drawing package
A common confusion: "drawings" can mean a single floor plan or a full set of construction documents. The difference is enormous in scope and price. A complete permit-grade package for a typical Ottawa addition includes:
- Cover sheet, project information, BCIN/architect stamp, drawing index
- Site plan, property lines, setbacks, existing buildings, proposed construction
- Existing floor plans, as-built conditions of every level
- Proposed floor plans, same levels showing the proposed work
- Exterior elevations, typically 4 sides of the building (front, back, both sides)
- Building sections, vertical cuts through the building showing floor heights, roof slope, foundation depth
- Foundation plan, footing locations, depths, sizes
- Framing plans, floor and roof framing layout, beam locations, post locations
- Roof plan, slopes, drainage, vents
- Schedules, windows, doors, finishes
- Construction details, wall assemblies, foundation-to-wall, roof-to-wall, key code-critical junctions
- Electrical and mechanical plans, fixture and equipment locations
The cheap drawings you'll see advertised online are usually just a single floor plan. Not a permit set. Not enough for a contractor to build from. Definitely not enough for the City of Ottawa to issue a permit.
Beware "drawings included free with the project"
When a contractor offers free drawings as part of the construction quote, the drawings are usually minimal, just enough to get a permit, not enough to actually price the work accurately. The "free" approach means you can't shop the project to other contractors, because the drawings belong to the original contractor and they aren't detailed enough for competitive bidding. Pay for proper drawings up-front, get a complete set, and use them to compare 2-3 quotes. A detailed set lets every bidder price the same scope, which usually saves far more on the build than the drawings cost.
The four line items where homeowners overpay
1. Multiple iterations on the same scope
Asking the designer to do "let's see it with three bedrooms instead of two, then maybe one master bath instead of two, then maybe a vaulted ceiling, then..." adds up. Each iteration on a complex layout is hours of redrawing the designer bills for. Limit yourself to 2-3 iterations per major decision, then commit.
2. 3D renderings on permit-only projects
3D renderings are beautiful but add a meaningful line item each. They aren't required for permits. They're helpful for client visualization and contractor pricing on complex projects, less helpful on a basement finish or simple addition. Skip them on Tier 1-2 projects.
3. Survey costs not included
For an addition, the City often requires a current property survey from an Ontario Land Surveyor. Not always included in the drawing fee. Ask up-front. If you have a survey from when you bought the house, it might be acceptable depending on age and any changes since.
4. Engineering as a separate line
BCIN designers don't stamp structural calculations. A second-storey, beam removal, or any load-bearing change needs a P.Eng (structural engineer) stamp. That's a separate fee on top of the BCIN drawings, scaled to the complexity of the structure. Ask if it's bundled or separate before you commit.
Timeline for drawings
From sign-off on scope to completed permit-ready drawings:
- Tier 1 (basement finish): 1-3 weeks
- Tier 2 (small addition or reno): 3-5 weeks
- Tier 3 (full design-build set): 5-9 weeks
- Tier 4 (architect-led): 8-16 weeks
Add 4-7 weeks for City of Ottawa permit review on top of the drawing time. The total time from "I want to renovate" to "I have a permit in hand" runs 8 to 24 weeks depending on tier.
The cheapest drawings are the ones that don't need to be redone. Half the projects we take over from other contractors have drawings that the City rejected, and the homeowner has to pay twice.
How we scope drawings as a design-build firm
We price drawings to the scope of the work, lowest to highest:
- Basement finish permit drawings: the lightest set, one level, fixed written fee
- Bathroom or kitchen gut reno drawings: adds plumbing, electrical, and finish detailing
- Single-storey addition (under 500 sq ft): adds site plan, elevations, and a framing plan
- Two-storey addition or second-storey: adds a second level, more sections, and structural coordination
- Full custom home: the full set, every level, all schedules and details
- Heritage permit add-on: extra documentation for the heritage review process
Engineering (when required) is a separate line scaled to the structure. Survey, when needed, comes from an Ontario Land Surveyor. We provide a detailed written breakdown so you see exactly what drives the number on your project before construction even starts.
The bottom line
Ottawa architectural drawings scale with scope: a permit-only basement set is the lightest, a small addition or kitchen reno adds elevations and structure, and a full design-build set on a 2-storey addition or custom home is the most involved. BCIN designer for most residential, architect only when required by code or by client preference. Pay for proper drawings up-front and use them to get competitive contractor quotes. We handle the full design + permit + build pipeline as part of our architectural plans in Ottawa service.