Extension in Keswick

House Extensions and Alterations

Image credit: Miller Clear Architects

This section of the code relates to house extensions and other development within the curtilage of a house.

Design information to submit with a planning application:

The type and level of information to be submitted with a planning application depends on the nature and impacts of the application itself. The ‘How to Apply’ page of the our website provides guidance on what these different levels and types of information are, and when they are required.

All applicants should submit the Checklist at the end of this Design Code. Householder applications (extensions etc.) outside Conservation Areas and not involving Listed Buildings do not need to include further design information.

Use the links below to scroll through the design code.

Site context

Context and Character

This chapter includes codes relating to:

  • Character types
  • Site context and assessment


This chapter includes codes relating to:

  • Local character
  • Design of buildings
  • Lighting, aspect and privacy
Resources image

Sustainable Design

This chapter includes codes relating to:

  • Energy hierarchy and efficiency
  • Embodied energy
  • Construction


This chapter includes codes relating to:

  • Gardens and balconies
  • Sustainable drainage
  • Network of spaces