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Platform

Three tools. One app.

Assist

Ask code & zoning anything

Clear, plain-language answers — with a link to the exact code or by-law section behind every one.

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Direct Answer:
Code references
9.7.2.3Minimum Window Areasp.735
9.9.10.1Egress Windows or Doors for Bedroomsp.764
9.5.1.2Combination Roomsp.725
Review

Check your drawings

Upload a PDF and BuildAiD flags code and zoning issues before the plan examiner does.

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A1.0 — Floor PlanIngesting PDF
Project — Sample ResidenceSheet A1.0 · 1 of 6
BEDROOMBATHKITCHENLIVINGHALLUP
BEDROOMBATHKITCHENLIVINGHALLUP
DOOR 815 mm
RISE 187 mm
SMOKE ALARM
0.32 m² · MIN 0.35
VECTORS 0 · WALLS 0 · DOORS 0 · WIN 0
9.5.11.1Entry door width 815 mmPASS
9.8.4.1Stair rise 187 mm — max 200PASS
9.10.19.Smoke alarm on floor levelPASS
!9.9.10.1Bedroom egress 0.32 m² — min 0.35FLAG
Review complete — 36 checks
1 issue flagged
FLAG · OBC 9.9.10.1
Bedroom egress window 0.32 m² — minimum 0.35 m² clear opening required
35 checks passedREPORT PDF READY
Library

Find any code fast

Search every code, plan and act — then snip what matters and save it to your project notes.

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Library
Building CodesThe Building Code — every division, part and article, with live tables and diagrams.1 document →
Zoning By-lawZones, standards, exceptions and address lookup.1 document →
Building Code Search the code…
Browse by division
A Division ACompliance, objectives & functional statements
B Division BAcceptable solutions — the technical requirements
C Division CAdministrative provisions & permits
Division B · Acceptable Solutions
7Plumbing39 sections
8Sewage Systems22 sections
9Housing and Small Buildings179 sections
10Change of Use5 sections
9.8 · Stairs, Ramps, Handrails and Guards
9.8.4.Stair Dimensionsp.741

The width of stairs shall be measured between wall faces or guards. Stairs serving a single dwelling unit shall have a width of not less than 860 mm. Risers shall be uniform, with height and run as set out in this Article…

Project Notes
Project Notes
Maple St. Renovation
"Stairs serving a single dwelling unit — width not less than 860 mm." — 9.8.4
✓ FILED · Saved to project
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Smarter, more accurate, more confident

Know the code before you build it.

Ask building codes and zoning by-laws in plain language. Auto-review drawing sets for compliance. Search every document from one place.

Who it's for

Built for everyone who builds.

Architects & designers

Architects, designers and interior designers — verify a clause as you draw, and back every decision on the sheet with the exact article behind it.

Builders, contractors & trades

Straight answers on site — stairs, guards, egress, fire separation — without waiting on a callback or digging through a binder in the truck.

Engineers

Cross-check structural, mechanical and life-safety requirements against the governing articles — cited, current, and searchable in seconds.

Municipal plans examiners

Move through review faster — search, compare and cite articles across every submission from one place.

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Coverage

Building codes & zoning, made searchable.

BUILDAiD is an AI platform built for people who work with building codes and zoning by-laws — designers, contractors, builders, and homeowners planning a renovation or new build.

Instead of searching through hundreds of pages, BUILDAiD Assist lets you ask questions in plain language and get clear answers backed by the exact code or zoning provision.

BUILDAiD Review goes a step further by analyzing uploaded PDF drawings for potential building code and zoning deficiencies before permit submission.

And BUILDAiD Library brings building codes, zoning by-laws, supplementary standards, and related regulations into one searchable place, with direct access to the provisions behind every answer.

From early project research to drawing review and permit preparation, BUILDAiD helps you find requirements faster, check your work, and make more informed decisions.

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