03/08/2026
Many of you would have seen some changes to Planning Rules and Regulations, particularly in terrms of exemptions this past week when it comes to planning permission around the home.
If you are thinking of making a change here's what it might mean for you:
Build a Garden Home — No Full Planning Permission Needed
A brand-new exemption (Class 3A) lets homeowners build a standalone garden dwelling of 32–45m² for family use — think granny flats or space for adult kids — without going through the full planning process. There are rules around height, boundary setbacks, and notifying your local authority, but for the right site, this is a genuine game-changer for multigenerational living.
More Room to Extend and Store
Rear single-storey extensions have jumped from 40m² to 45m², non-habitable garden buildings (sheds, home offices, gyms) now go up to 30m², and there's a new dedicated exemption for bike and bin storage. Small increases, big impact on what you can achieve without red tape.
Split Your House, Convert Your Attic
You can now subdivide an existing home into two self-contained units within the same footprint, and there's clearer scope for dormer conversions and rooflights — opening up options for extra income, extended family, or simply more living space.
A quick note: planning exemption doesn't mean Building Control exemption. Structures still need to meet full Technical Guidance Standards, and you'll need an Architect's Certificate of Compliance down the line if you ever sell.
Thinking about what this could mean for your own home? We'd love to hear what you're hoping to achieve — get in touch with the DMA Architects team and let's talk it through. 😁
DMA