Romsey, Hampshire
Two-storey rear extension in Romsey
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Romsey and want to know what a two-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Romsey is covered from our Hampshire round, including SO51. In Romsey, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Romsey?
A two-storey rear extension in Romsey is priced at £2,020–£3,020 per square metre including VAT as a guide, before kitchen fit-out and fees. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a two-storey rear extension in Romsey?
Planning for a two-storey rear extension in Romsey follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Romsey like to extend?
Commuter semis and detached houses make up much of Romsey, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a two-storey rear extension in Romsey comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Two-storey rear extensions near Romsey
Neighbouring places we cover include Totton (4.9 miles) and Portswood (6.4 miles).
- Two-storey rear extension in Totton
- Two-storey rear extension in Portswood
- Two-storey rear extension in Eastleigh
- Two-storey rear extension in Southampton
- Two-storey rear extension in Bishopstoke
Other work in Romsey:
FAQ
Two-storey rear extension questions in Romsey
What postcode areas do you cover around Romsey?
Including SO51, and the surrounding Hampshire area.
Do I need planning permission for a rear extension in Romsey?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
Can it be built on a terraced house?
Sometimes, but the upper floor is harder to get through planning on a terrace because of the effect on neighbours. A single-storey extension with a loft conversion is often an easier route.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Do you handle building control in Romsey?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.