Kitchen Extension Planning Permission in Portsmouth

Most single-storey rear kitchen extensions in Portsmouth fall under permitted development, meaning no full planning application is needed - though narrow terraced streets across Fratton and Landport typically have no side access, which a builder will price in regardless of planning status.

Permitted development limits

A single-storey rear extension is commonly allowed up to 3m beyond the rear wall for a terraced or semi-detached house, or 4m for a detached one, without needing planning permission. The "larger home extension" prior approval scheme extends those limits to 6m and 8m respectively, but requires notifying neighbours via the council and waiting out an objection period first. Height limits also apply - commonly around 4m maximum, and no higher than 4m within 2m of a boundary.

Where it gets more complicated

Given how tightly Portsmouth's Victorian terraces were built on a genuinely small island, materials and spoil having to go through the house is common across most of the city, not just certain streets - worth pricing in from the outset. Where a conservation area applies, expect closer scrutiny of materials and roofline too.

Get it confirmed, don't assume it

A Lawful Development Certificate from Portsmouth City Council is a formal, low-cost confirmation that protects you if a neighbour complains or you sell the house later. A builder who works regularly in your specific part of the city will usually already know what's realistic for your street.