Some Coventry rear extensions can use permitted development rights. Others require prior approval or a householder planning application. Start by measuring from the original house and checking the planning history for your address. The depth of the proposed addition alone won’t settle the question.
Work Out Which Route Applies
Find the original rear wall, any original projecting wing and any later extensions. Record the proposed height and depth, the distance to boundaries and whether the scheme extends beyond a side wall. Check Coventry’s planning map and decision history for conservation area or listed status and any restrictions on permitted development. If you’re relying on permitted development and need a formal decision, consider a proposed Lawful Development Certificate.
Some larger single-storey rear extensions qualify for a prior approval procedure. Check the full set of conditions before you assume that a depth you’ve seen online is available on your site. Coventry specifically explains how it assesses proposals next to an original rear wing where the extension may also project beyond its side wall. An apparently simple addition can raise both rear and side extension rules. If the proposal does not qualify for the permitted development route, check the householder application process.
Check Coventry’s Rear Extension Design Guidance
For a planning application, use Principle 5 in Coventry’s Householder Design Guide early in the layout. Its rear extension guidance considers the position of neighbouring habitable-room windows, the 45-degree line shown in the council’s diagrams, boundary projection, orientation and ground levels. It distinguishes single-storey from two-storey work and addresses situations where the original rear building line is staggered.
Show the nearest relevant windows and boundaries on your site plan where you can establish their position reliably. A section can explain differences in ground level, roof height or a relationship a plan does not capture. The planning officer will have more useful information than a single dimension along the side wall.
Example: A Staggered Pair of Semis
Imagine a Coventry semi-detached house where the adjoining home’s rear wall sits a metre further forward. A proposed rear extension measured from your wall may project further when seen from the neighbour’s rear window. Mark both rear walls on the same drawing and plot the relationship to that window using the council guide. If the first option creates a poor relationship, consider a shallower boundary wall, a different roof or moving some of the footprint away from the shared side.
Prepare for the Next Approval
Keep the site measurements, planning decision and final drawings together. Ask your designer to flag drainage, structural openings and the floor level at the outset. Those details feed into the separate Building Regulations design and can affect whether the proposal is practical to build.
If you have a Coventry address, photos and a sketch of the rear extension, ask Ashbridge Design to review the planning drawings brief.