Builders & Designers
Loft Conversions & Extensions

Building regulations

Helping you cut through the red tape

Most loft conversions and house extensions can be built under 'Building Regs', and often do not need 'Full Planning' permission.

After contacting us for advice and quote, we arrange for our architect to produce the design drawings required of your building project, loft or extension. Once all parties are happy they are submited to the local authority.

When the project commences, we take on the responsibility of liaising with the local authority representation, who is required to inspect all the work we produce at specified stages through to completion.


Planning Permission or Building Control Consent?

The bullet points below give an initial indication of whether formal planning permission or building regulations approval is needed.

Please use the links below which gives guidance on permitted development.

If you wish to install dormer windows you will not need to submit a planning application subject to the following limits and conditions:

  • That the dormer is no larger than 40 cubic metres for terraced houses
  • That the dormer is no larger than 50 cubic metres for detached and semi-detached houses
  • No extension beyond the plane of the existing roof slope of the principal elevation that fronts the highway
  • No extension to be higher than the highest part of the roof
  • Materials to be similar in appearance to the existing house
  • No verandas, balconies or raised platforms to be created
  • Side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor
  • Roof extensions always require a planning application in Conservation Areas (Check Redbridge Conservation Area map if you're unsure as to whether you live in one of these areas)
  • Roof extensions, apart from hip to gable ones, must be set back, as far as practicable, at least 20cm from the eaves
  • If you live in a house (not a flat, maisonette or a commercial property) you may be able to build an extension without the need to make a planning application, subject to the following limits and conditions:

  • No more than half the area around the 'original house' is covered by (out)buildings
  • No extension projects forward of the principal elevation or side elevation fronting a highway
  • No extension is higher than the highest part of the roof
  • Maximum depth of a single-storey rear extension of three metres for a semi/terraced house and four metres for a detached house
  • Maximum height of a single-storey rear extension of four metres
  • Maximum depth of a rear extension of more than one storey is three metres including ground floor
  • Maximum eaves height of an extension within two metres of the boundary is three metres
  • Maximum eaves and ridge height of extension no higher than existing house
  • Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house
  • Two-storey extensions no closer than seven metres to rear boundary
  • The roof pitch of extensions over one storey must match the existing house
  • Materials to be similar in appearance to the existing house
  • No verandas, balconies or raised platforms
  • Upper-floor, side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor
  • In Conservation Areas, rear extensions of more than one storey require a planning application
  • In Conservation Areas, no exterior cladding or side extensions are permitted without a planning application
  • Check (Check Redbridge Conservation Area map if you're unsure as to whether you live in one of these areas

  • For a quote or advice
    E: info@pglofts.co.uk
    T: 020 8506 2291
    M: 07940 535 472

  • Over 20 Years Experience
  • Work Guaranteed for 10 years
  • Local Authority Approved
  • Free Surveys
  • Free Detailed Quotes & Design
  • Daytime or Evening Appointments
  • From Plans to Completion
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