Planning & Regulations

What a lawful development certificate is, what it costs in 2026, how long it takes and when it is worth getting one for an extension or loft conversion.

What party wall surveyors charge in 2026, from serving notices to full awards, with costs by project type, London prices and who pays the bill.

A plain-English guide to the Party Wall etc. Act 1996 for extensions and loft conversions: when you need to serve notice, what your neighbour can do, and how long it takes.

The permitted development rules for rear, side, two-storey and wrap-around extensions in England, when you need prior approval or planning permission, and what each costs in 2026.