We built a garden suite in our Dieppe backyard for my parents — here's what we wish we'd known before starting?

Building a garden suite in Dieppe is an excellent way to create multi-generational housing, but there are definitely some key considerations that can make or break the project. Your experience can help other homeowners planning similar builds in the Greater Moncton area.

Zoning and permits are the first hurdle many families underestimate. The City of Dieppe allows secondary dwelling units in most residential zones under their updated zoning bylaw, but there are specific requirements for lot coverage, setbacks, and parking that can be tricky to navigate. You need both a development permit from Dieppe's Urban Planning department (506-877-7900) and a building permit to ensure NBC 2020 compliance. Many families discover late in the process that their lot doesn't meet the minimum requirements or that utility connections are more complex than expected.

Foundation and servicing costs often surprise homeowners. With Dieppe's clay soils and high water table, proper drainage and waterproofing are critical. Garden suites require separate electrical service (wiring permit from NB Power at 1-800-615-0522), and connecting to municipal water and sewer can run $8,000-$15,000+ depending on distance from the main house and existing infrastructure. If you're in an older Dieppe neighbourhood, the electrical panel in your main house might need upgrading to handle the additional load.

The fire separation requirements under the National Building Code are particularly important for garden suites. You need proper fire-rated construction between units, interconnected smoke and carbon monoxide alarms throughout both buildings, and adequate egress windows in all bedrooms. These safety features add cost but are non-negotiable for TIS inspections.

Seasonal timing makes a huge difference in Dieppe. Starting excavation in late spring allows you to get the foundation poured and framed before winter, but material deliveries can be challenging during our freeze-thaw cycles. Many contractors recommend having the structure weathered-in by October to continue interior work through winter.

Accessibility planning is something many families wish they'd considered more carefully. Even if your parents are mobile now, incorporating features like wider doorways, a barrier-free entrance, and a main-floor bedroom and bathroom can extend how long they can comfortably live in the suite.

What specific challenges did you encounter during your build? Your insights could help other Dieppe families considering similar projects, especially around utility connections or dealing with the city's approval process.