Two-storey side extensions in Warwickshire

What a two-storey side extension involves

A two-storey side extension suits a detached or semi-detached house with a side garden, driveway or garage wide enough to build on. You get a design that sits comfortably on the street, a planning application or permitted development check depending on your nation, structural design, building regulations approval and the build itself. We manage the whole process, and the work is carried out by vetted teams working under S&K.

Warwickshire towns we list: Nuneaton (CV10), Rugby (CV21), Leamington Spa (CV31), Warwick (CV34), Bedworth (CV12) and Stratford-upon-Avon (B49). Every other address in Warwickshire is covered as well.

Guide price in the West Midlands

Expect a two-storey side extension in Warwickshire to land somewhere around £86,000–£115,500 for a 3 m × 7 m footprint on two floors (42 m² of new floor space). Our West Midlands guide rate is £2,050–£2,750 per m², including VAT. We'll give you a written design-stage price first, then a fixed build price once the drawings are agreed.

Rules in England

In England, a two-storey side extension always needs householder planning permission, because permitted development only allows single-storey extensions beyond a side wall. The fee is £548 (or £575 for applications made from 8 December 2026), and councils should decide within 8 weeks of validation. Expect them to look at set-back, roof height, gaps to the boundary and the effect on neighbours.

The Party Wall etc. Act 1996 applies, so notices may be needed for work on or near a shared wall or boundary.

Getting the design right

Avoiding a terracing effect

Where semi-detached houses sit close together, side extensions on neighbouring houses can join up and turn a row of pairs into a terrace. Many councils ask for a gap to the boundary at first floor to stop this, so we check local guidance before fixing the width.

Matching the ridge and roof

A hipped house usually needs a hipped extension roof, and a gabled house a gable. Matching the pitch, tiles, ridge detail and brick bond is what makes a side extension look original rather than added, and councils look closely at it on a front-facing addition.

How we work in Warwickshire

1. Free site visit

   We visit your home in Warwickshire, look at the structure, access and boundaries, and talk through what you want the new rooms to do.

2. Choose the approval route

   Some designs fit permitted development, most need a householder application. We decide which applies in England before drawing in detail.

3. Fixed price in writing

   With approved drawings and calculations, we give you a fixed build price and a programme you can plan around.

4. Build and hand over

   We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.

Towns we cover in Warwickshire

• Nuneaton
• Rugby
• Leamington Spa
• Warwick
• Bedworth
• Stratford-upon-Avon
• Kenilworth
• Hartshill
• Atherstone
• Attleborough (Warwickshire)

Neighbouring areas

• Two-storey side extensions in the West Midlands
• Two-storey side extensions in Leicestershire
• Two-storey side extensions in Northamptonshire
• Two-storey side extensions in Worcestershire

All extension services in Warwickshire · About two-storey side extensions