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Local Development Order

What does the Local Development Order allow?

It allows extensions to be built larger than that granted under the national permitted development rights. A helpful comparison is provided below

Rear extensions GPDO Size / limits LDO Size / limits
Single-storey Yes 3m depth from rear of house (or 4m depth for detached houses) Yes 6m depth (or 8m depth for detached houses)
Two-storey Yes 3m depth Yes 3m depth (or 4m for detached houses)
Side extensions GPDO Size / limits LDO Size / limits
Single-storey Yes No more than half the width of the house Yes No more than half the width of the house
Two-storey No N/A Yes
  • No more than half the width of the house
  • Extension set back and set down from main house by 0.5m

Are there any other restrictions on size and location of extensions?

Yes, the Local Development Order (LDO) sets out a number of conditions that need to be complied with, this includes location and obscurity of windows, compliance with a 45 degree line from a neighbour’s window and the use of matching materials. The SNC Design Guide is a useful document, and your plans will also need to comply with it. A full copy see the Local Development Order.

How long will the LDO be in operation for?

It will operate until 31 March 2022

Does it cover the whole of the district?

Yes, it covers all of the district, with the following exemptions:

  • Listed Buildings and Monuments
  • Sites immediately adjacent to, or immediately opposite, Listed Buildings and Monuments
  • Conservation Areas
  • Historic / Registered Park and Garden
  • Historic Battlefield
  • SSSI (Site of Special Scientific Interest)
  • Land subject to an Article 4 Direction
  • Designated Wildlife Sites
  • Land within Flood Zones 2 or 3
  • If the property is not a Class C3 dwellinghouse (ie a normal house)
  • Within 10 metres of the boundary of a railway
  • Within 20 metres of the bank of a main river (apart from in Towcester, which benefits from engineered flood defence)

You can use our online mapping to see if your property has any of the constraints listed above.