Class A
The enlargement, improvement
or other alteration of a dwelling
house.
Planning Permission
Conservatory (single-storey)
Adding a conservatory to a house is considered to be
permitted development, not requiring an application for
planning permission, provided these limits and conditions
are met:
1. On designated land cladding of any part of the exterior of a dwelling (and extensions/ conservatories) with stone, artificial stone, pebble dash, render, timber, plastic or tiles is not permitted development.
2. On designated land conservatories extending beyond
any side wall of the original house are NOT permitted
development.
3. Conservatories (including previous extensions) and other buildings must not exceed 50% of the total area of land around the original house.
* Sheds and other outbuildings must be included when
calculating the above 50% limit
4. Conservatories forward of the principal elevation or side elevation of the original house and fronting a highway are NOT permitted development.
5. Side conservatory must not have a width greater than half the width of the original house.
6. Side conservatories to be single storey with a maximum height of four metres.
7. If conservatory (at side or rear) is within two metres of a boundary maximum eaves height should be no higher than three metres to be permitted development.
8. Single-storey rear conservatory must not extend beyond the rear wall of the original house by more than three metres if an attached house or by four metres if a detached house.
9. Single-storey rear conservatory must not exceed a height of four metres.
10. Maximum eaves height should be no higher than the
eaves of the existing house. The highest part of the
conservatory should be no higher than the roof ridge
line of the existing house.

Building Regulations
Conservatories are normally exempt from building regulations when:
1.They are built at ground level and are less than 30 square metres in floor area
2.At least half of the new wall and three quarters of the roof is either glazed or translucent material
3.The conservatory is separated from the house by external quality door(s).
4.Glazing and any fixed electrical installations comply with the applicable building regulations requirements (see below).

You are advised not to construct conservatories where they will restrict ladder access to windows serving rooms in roof or loft conversions, particularly if any of the windows are intended to help escape or rescue if there is a fire.
Any new structural opening between the conservatory and the existing house will require building regulations approval, even if the conservatory itself is an exempt structure.

Conservatory Plans
Summary

A Conservatory may not require planning permission or building control approval.
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Definitions of terms used in this guide:

IMPORTANT NOTE: The permitted development allowances described here apply to houses, not flats, maisonettes or other buildings. You should check with your Local Planning Authority whether permitted development rights apply - they may have been removed by what are known as Article 4 directions.
Other consents may be required if your house is listed or in a designated area. Designated land includes: conservation areas, World Heritage Sites, national parks and the Broads and Areas of Outstanding Natural Beauty. These may have
some restricted permitted development rights for
householders. It is better to contact your LPA in such
circumstances.

‘Original house’ - The term ‘original house’ means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you
may not have built an extension to the house, a previous owner may have done so.

‘Designated land’ - Designated land includes national parks and the Broads, Areas of 0utstanding
Natural Beauty, conservation areas and World Heritage Sites.

Installation, alteration or replacement of a chimney, flue or soil and vent pipe: Read guidance on the permitted development regime under Class G of the regime which came into force
on 1 October 2008.

DISCLAIMER: Users should note that this is an introductory guide and is not a definitive source of
legal information.
Standard Architectural Service
Standard Service

Includes a full dimensional survey of your property plus the Alpha Surveys Architectural planning package.
Budget Architectural Service
Budget Service

Includes the planning package without a dimensional survey. The client must provide the required dimensional information and also make the necessary submissions to the Planning and building Control Departments.

Conservatory