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Timelines, documents and the three things that most often send an application back for revision.
A building permit is the local authority’s check that what you plan to build is safe, legal and consistent with the zoning for your plot. For most extensions, structural changes and new builds it is not optional, and starting without one can mean taking finished work apart.
What goes into an application
Expect to submit drawings stamped by a licensed professional, a site plan, structural calculations where loads change, and energy compliance details. Four to eight weeks is common for a residential application, longer where a zoning variance is needed. Three things send applications back more than anything else:
- Drawings that do not match the site survey
- Missing structural or energy calculations
- Setbacks or heights that break the zoning rules
Inspections do not stop at approval
The permit is the start of the process, not the end. Inspectors visit at set stages — foundations, framing, insulation and final — and each has to pass before the next begins. Build those visits into the programme and the certificate of occupancy follows without a wait.
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