Planning an extension, loft conversion, or outbuilding? Here's everything you need to know before you submit.
A householder planning application covers works to an existing house that fall outside permitted development rights. This typically includes rear extensions over 3m (or 4m for detached houses), side extensions, loft conversions involving dormers or roof alterations, and certain outbuildings. If you're unsure whether you need permission, apply for a Lawful Development Certificate rather than assuming.
The fee for a householder application in England is currently £258. This covers one application regardless of the number of works proposed, provided they're all at the same address.
Local planning authorities have a statutory target of 8 weeks to determine householder applications. In practice, many councils take longer — 10-14 weeks is common. Conservation area applications or those requiring additional consultations may take longer.
At minimum: a completed application form, site location plan (1:1250 scale), existing and proposed floor plans and elevations, and the correct ownership certificates. Many councils also want a block plan showing your site in context. Check your council's local list requirements before submitting.
Look at what's been approved nearby before you design anything. If your street has several approved rear extensions of similar scale, that's powerful precedent. Keep the design simple and subservient to the main dwelling. Avoid materials that contrast strongly with the existing house. Speak to your immediate neighbours before submitting — a neutral or supportive neighbour is far better than an objection.
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