Services · House extensions and loft conversions

House extension plans and loft conversion drawings in Bristol, Bath and the South West

Rear, side-return and wraparound extensions, oak-frame extensions, and loft and garage conversions, designed to sit comfortably with the original house.

Oak-frame glazed extension on a Victorian brick house

Whether it is a single-storey kitchen extension or a whole-house remodel, we design it to make the most of your space and your budget, then take it through planning and Building Regulations so your builder has everything they need.

Typically includes

Measured survey of the existing house
Design options and 3D views
Planning application, or a Lawful Development Certificate under permitted development
Building Regulations drawings and specification
Structural engineer and party wall coordination
Tender and project management

What to expect

Planning permission or permitted development?

Many single-storey rear extensions and some loft conversions can be built without a planning application under permitted development. Others, including most side and two-storey extensions and anything in a conservation area or on a listed building, need planning permission. We check which applies to your house first, so you don't pay for an application you don't need.

What the drawings include

For planning, we prepare existing and proposed floor plans, elevations, site and location plans, and any supporting statements. For Building Regulations, a fuller technical package covers structure, insulation, fire safety, drainage and ventilation, coordinated with the structural engineer's calculations.

Oak-frame and glazed extensions

Oak-frame and glass extensions work well on period houses, but the junction with the existing building, the roof drainage and the thermal performance of the glazing need careful detailing. We detail these junctions carefully, so they are resolved on paper before the frame arrives on site.

Where we work

We design extensions and loft conversions across Bristol, including Clifton, Redland, Bishopston, Southville and Westbury-on-Trym, as well as Bath, North Somerset, South Gloucestershire, Somerset, Wiltshire, the Cotswolds and London. We know the local planning policies and how each council tends to view extensions in conservation areas.

Planning an extension? Let's talk it through.

Tell us about the house and what you want from the extension, and we will arrange a conversation.

Free initial consultation