Planning a home extension, loft conversion, or garden room? Then one of your first questions will likely be:
👉 “Do I need planning permission?”

Here’s a clear guide for homeowners across Hampshire — whether you’re in Fareham, Bishop’s Waltham, or Alresford.

📝 When You Don’t Need Planning Permission (Permitted Development)

Many smaller home improvements fall under Permitted Development (PD) rights — meaning you don’t need full planning approval, as long as:

• The extension doesn’t exceed certain height/size limits
• You’re not in a conservation area or AONB
• You use similar materials to the original house
• It doesn’t overlook neighbours or block light

✅ Common PD examples:

• Loft conversions with rooflights
• Single-storey rear extensions under 3m (semi-detached) or 4m (detached)
• Garage conversions
• Internal reconfigurations

📍 Hampshire Caveats

In areas like Winchester, Test Valley, and the South Downs National Park, stricter rules apply. If your home is in a conservation area (e.g. Beaulieu, Itchen Valley), planning permission is usually required even for minor works.

📄 When You Do Need Full Planning Permission

• Two-storey extensions
• Altering roof height or shape
• Building in front of the house
• Projects on listed buildings
• Extensions that exceed PD limits

🧠 Architect Tip

A local architect will:

• Check local planning maps
• Apply on your behalf
• Liaise with the council
• Adjust designs if objections arise

🧾 How Long Does It Take?

• 8 weeks for most standard applications
• Longer if there are objections or revisions
• Pre-application advice adds 2–4 weeks but can reduce later delays

✅ Final Thought

Planning rules vary by area, property type, and design. To avoid delays and stress, speak to an experienced Hampshire architect early — they’ll help you unlock the full potential of your home, legally and efficiently.