Saint John, NB

Building permits in Saint John

Saint John’s Permitting and Inspection service reviews residential construction, renovation and demolition applications and conducts inspections.

Official sources checked Sep. 24, 2026

Permit rules by project

Pick the project that matches your work. These are starting rules for Saint John; property-specific zoning, heritage and trade approvals can still apply.

Decks

Confirm with city

A Saint John deck can raise permit questions around height, attachment, guards, stairs, structural changes and whether the deck is covered; with the official Saint John page below providing the local forms, thresholds and drawing requirements.

Sheds & accessory buildings

Confirm with city

For a shed or accessory building in Saint John, size, use, plumbing, attachment, height and zoning setbacks are the common approval variables; with the linked Saint John municipal page providing the final project-specific check.

Basement renovations

Confirm with city

For a basement project in Saint John, simple finishing can follow a different path from structural work, new plumbing, a new entrance, underpinning or creating a dwelling unit; confirm the project against the official Saint John information linked below.

Secondary suites & ADUs

Confirm with city

For suites in Saint John, the planning checklist usually includes zoning, building-code issues, fire/life-safety, egress and trade work; with the official Saint John page below providing the local forms, thresholds and drawing requirements.

Home additions

Confirm with city

The usual approval questions for a Saint John addition include zoning, the altered footprint or floor area, drawings and structural review; with the linked Saint John municipal page providing the final project-specific check.

Interior alterations

Confirm with city

Interior permit requirements in Saint John can change when a project affects walls, occupancy, exits, fire separations, plumbing or structural elements rather than finishes alone; with the Saint John municipal link below serving as the final check before work starts.

Walls / structural work

Confirm with city

Structural work in Saint John can include changes to load-bearing walls, openings, framing, foundations or load paths, all of which may require building review; use the linked Saint John source to confirm what applies to this property and scope.

Pools / hot tubs

Confirm with city

For a Saint John pool or hot tub, do not look only at the installation; enclosure, zoning, grading and setbacks can also affect the project; with the official Saint John page below providing the local forms, thresholds and drawing requirements.

Garages / carports

Confirm with city

When planning a Saint John garage or carport, verify size, attachment to the home, lot setbacks, any plumbing and the structural design; use the linked Saint John source to confirm what applies to this property and scope.

Plumbing / HVAC

Confirm with city

Plumbing and HVAC work in Saint John may need its own approval route for drainage, heating, ventilation or related trade work; the current local path should be verified through Saint John’s municipal source below.

Retaining walls

Check size / scope

Saint John states that a retaining wall greater than 1 m requires a permit and engineered drawings; work under 1 m is treated as landscaping.

Apply or ask Saint John

Use the municipality’s permit office for current forms, fees, drawings and questions about your property.

Saint John One Stop Development Shop

Address
First floor, City Hall, Saint John, NB
Contact the permit office ↗

Your application route

Open the official permit page ↗

Use the official permit page to confirm project requirements, forms, fees and the current application process.

Other approvals

Saint John handles the building-permit/inspection layer. Electrical wiring permits are processed through the provincial/NB Power system and inspections through Technical Inspection Services; gas and other technical-safety work can require separate provincial approval. Province/authority source ↗

Good to know in Saint John

  • The city publishes separate submission packages for residential, accessory-building, fence or retaining-wall and other permit types.
  • New Brunswick municipal projects can involve local land-use review together with code and safety requirements; check the complete approval path before starting.

Official sources

Use these official links to confirm the current rule for your Saint John property.

View 1 official source

Sources checked Sep. 24, 2026. Requirements can change; the municipality makes the final permit decision.

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