What's the approval process for a garden suite in Dieppe?

Garden suites (also called secondary dwelling units) in Dieppe require both zoning compliance and building permits through the City's Urban Planning department. The approval process involves multiple steps and can take 2-4 months depending on your property's zoning and the suite's design.

Zoning and Development Permit Requirements

First, contact Dieppe's Urban Planning department at (506) 877-7900 to confirm your property's zoning allows secondary dwelling units. Dieppe's zoning bylaw permits garden suites in most residential zones, but specific requirements vary by zone including maximum size (typically 40-60% of the main dwelling), setback requirements, and parking provisions. You'll need a development permit before applying for building permits — this ensures your proposed suite meets zoning requirements for lot coverage, building height, and separation distances.

The development permit application requires a site plan showing the proposed garden suite location, existing structures, property lines, and parking areas. Dieppe typically requires one additional parking space for the garden suite beyond what's required for the main house.

Building Permit Process

Once zoning approval is secured, you'll need a building permit from the City of Dieppe for the garden suite construction. Your application must include detailed architectural drawings showing compliance with the National Building Code of Canada 2020 edition (effective May 1, 2025 for new applications in NB, with mandatory Tier 2 energy efficiency requirements).

Code Requirements for Garden Suites

All garden suites must meet specific NBC requirements: separate entrance from the main dwelling, egress windows in all bedrooms (minimum 3.77 sq ft opening), interconnected smoke and carbon monoxide alarms throughout both units, minimum 1.95m (6'5") ceiling height, and fire separation between units if attached (minimum 45-minute fire-rated assembly). The suite needs its own heating system or fire-rated ductwork if sharing with the main house.

Trade Permits and Inspections

Electrical work requires a wiring permit from NB Power (1-800-615-0522) and must be performed by a TIS-licensed electrician, with final inspection by Technical Inspection Services at 1-888-659-3222. Plumbing connections need a plumbing permit from TIS and installation by a licensed plumber. If you're adding gas service, a licensed gas fitter and TIS permit are mandatory.

Timeline and Costs

Development permit review typically takes 4-6 weeks, while building permit processing adds another 3-4 weeks. Total permit fees range from $2,500-$6,000 depending on the suite's size and complexity. Construction costs for a garden suite in Dieppe typically run $150,000-$280,000 for a 600-800 sq ft unit, factoring in New Brunswick's construction costs and current material prices.

Next Steps

Start by calling Dieppe Urban Planning at (506) 877-7900 to discuss your specific property and zoning requirements. They can provide the current application forms and fee schedule. Having a preliminary site plan sketch ready will help them give you more specific guidance about feasibility and requirements for your lot.

Find verified contractors experienced with garden suite construction in our New Brunswick directory to help navigate the design and permitting process.

---

Find a General Contractors Contractor

New Brunswick Construction Network connects you with experienced contractors in the directory:

• Larmondin Carpentry ✓
• Eager Beaver Gutter Co ✓
• Leading Edge Homes Saint John ✓