Planning Permission

Considering a loft conversion or house extension?

What is Planning Permission?

Planning permission is consent from the local authority to allow you to build on land or alter a building.  Sometimes called Planning Consent.  Planning Permission isn’t always required. See Permitted development below.

Do I need Planning Permission for an Extension?

Planning Permission is required for new buildings, major alterations to existing buildings and to change the use of buildings or land.  It is not generally required for an extension provided it is within the boundary of the property and is not more than half the total area of the property.  An extension to your house is generally considered to be permitted development.

How long Does Planning Permission Last?

Once you have been granted the go-ahead for Planning Permission you have three years from the date it’s granted to begin the development unless your permission says otherwise.  If you don’t begin work before this period, you will probably have to reapply.

How Much Can you Build Without Planning Permission?

An extension can’t be higher than the highest part of the existing roof.  A homeowner can build a single-storey rear extension that must not extend beyond the rear wall of the original building by more than 12 m2 if it’s a semi-detached or terraced house. If a detached house, 40 m2.  20 m2 can be added to the first floor of a detached house without planning permission.

What is Permitted Development?

Permitted Development Rights are general permission granted by parliament, not the local authority to carry out certain building and alteration work. These types of works can be carried out without the need to apply for Planning Permission.

Orangeries Winchester


Orangeries, like conservatories, are usually buildings with glazed sides and brick or wood supports. Our Orangeries use less glass than modern conservatory styles.

Kitchen Renovations Winchester

Kitchen Renovation

Planning and remodeling your kitchen into a modern area for entertaining and dining is simple with Home Builders Hampshire.

Kitchen Extensions Winchester

kitchen Extensions

kitchen extension could be the solution to your dream home. Making use of wasted outdoor space it is a popular solution for a single-storey extension.

Prefab Extension Winchester

Prefab Extensions

prefabricated construction is a quick way of adding an extension to your property.  We supply and install brick faced and rendered modular buildings, ideal for extra living space.

Rear Extensions Winchester

Rear Extensions

Single-storey side and rear extensions on homes are a popular choice to add value to properties.

Garden Room Extensions Winchester

Garden Room Extensions

Bring space and light to your home with a garden room extension. We design and build luxury glazed modern garden rooms.

House Renovations Winchester


We offer complete property renovations to improve run down and outdated buildings in Hampshire. Our house and bungalow renovations include kitchens, bathrooms, electrics and central heating. General building and structural renovations.

Garage Conversions Winchester

Garage Conversions

Convert your garage into living space.  Some single-storey extensions don’t need planning permission, many home improvement projects can be done under Permitted Development Rights.

Building and Construction Services

Winchester, Southampton & Local Hampshire

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