City of London has one of London's highest conservation area coverages at 80%, which affects many porch proposals. Householder approvals in City of London run at around 72% with an average decision time of 12 weeks.
In City of London, whether a porch needs planning permission depends on specific constraints — conservation area, Article 4, listed status or flood risk. Check your address to see which apply.
Porches are permitted development under GPDO Schedule 2, Part 1, Class D within specific size limits.
Read the full porch planning guide for the national rules and application process.
The CanUBuild checker surfaces real recent applications close to your address — approvals and refusals — so you can see what the planning officers at City of London Corporation have approved for comparable schemes. Nearby precedent is one of the strongest signals for your own chances.
In City of London, the answer depends on whether your property sits in a conservation area (80% of the borough), is listed, or falls within an Article 4 direction. Most porch proposals are permitted development for houses when they stay within GPDO limits and no local constraint applies. Check your exact address with the CanUBuild checker before spending on drawings.
Conservation areas in City of London typically remove several permitted development freedoms. For a porch, the Larger Home Extension route and some external alterations do not apply, so a full householder application is usually required. Planning officers at City of London Corporation assess conservation area proposals against the specific character appraisal for the street.
City of London Corporation currently averages around 12 weeks for householder applications. Complex porch proposals — particularly those in conservation areas or on listed buildings — can take longer. Prior approval decisions for Larger Home Extensions are typically issued in 42 days.
Address-level constraints and recent decisions around the corner. No drawings needed.