Extension Kits

Many people extend their home to make it individual, meet changing family needs and add value to the property, rather than face the expense and disruption of moving house. Benfield ATT are experienced professionals when it comes to timber frame home extensions. Due to popular demand, these can be supplied as loose panels (kits), or fully project managed by ourselves, from design to erection.

Benfield ATT Post & Beam Extension Kit, South Wales

Benfield ATT understand the ins, outs, ups and downs of extending your home and as such now offer individually-designed Timber Frame extension kits to all our customers - residential or commercial.

Benfield ATT Home Extension Kits, although individually designed, can be delivered to your doorstep in panel form and erected by a Benfield ATT Shell Erection Team or your preferred local builder, within a couple of days (depending on size).

General Planning Notes to Help Your DIY Extension Project:

The position or erection of extensions to a dwelling may, or may not, require planning permission and further advice should be sought before proceeding. It is important however to design the extension in sympathy with the original building and street scene. Over the years we have picked-up the following useful information;

Single Storey Planning Guidance

Single-storey extensions can have an overshadowing effect on surrounding gardens and reduce daylight into nearby windows. To lessen the effect, they should usually be designed so as to not project backwards more than 2.5 metres.

Timber Frame Design & Build, Kent

Two-Storey Planning Guidance

Whereas a two-storey extension may be perfectly acceptable on a detached house, it may be less acceptable for planning permission on a terraced or semi-detached, as it could seriously overshadow your neighbours property. Talk to your local planning office for further advice.

Joint Extensions

A joint scheme on a pair of semi-detached houses is much more likely to be suitable for planning permission than a single extension and has the advantage of reducing building costs.

Pitched Roofs

When pitched roof buildings are being extended, it is normally more pleasing to planners to have pitched roof extensions (especially in the case of two-storey extensions).


As a general rule, and to keep the value of your property as stable as possible, Councils suggest that no more than a third of a small garden should be taken up by extensions. The design of a good extension requires skill and knowledge if you need help with the design of your new extension click here. It is also recommended that a professional and experienced project management company who can manage your project from design to build, such as Benfield ATT, is approached.

For more Help & Advice On Extending your home visit our Home Extension Site by clicking here

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