Two-storey extensions for detached houses in Ross-on-Wye

Quick reference for homeowners in Ross-on-Wye.

Postcode districts: HR9
County / area: Herefordshire, England
Price region: West Midlands
Guide price: £86,000–£115,500 (£2,050–£2,750 per m²)
Approval route: Depends on position: a two-storey rear extension may be permitted development (3 m deep, 7 m from the rear boundary); a two-storey side extension needs planning permission.
Nearest towns: Cinderford (7 miles), Ledbury (10.2 miles), Belmont (Herefordshire) (11.5 miles)
Distance to Hereford: about 11.6 miles
First visit: Free, no obligation

About a two-storey extension for a detached house

This service suits you if you own a detached house and want a substantial amount of extra space, whether a side extension over a drive, a rear extension into the garden or a wraparound. You get a survey of the whole plot, options that compare layouts and costs, the approvals your nation needs, structural design and the build, carried out by vetted teams working under S&K.

We cover postcode district HR9 in and around Ross-on-Wye, along with neighbouring Cinderford, Ledbury and Belmont (Herefordshire).

What it costs in Ross-on-Wye

Expect a two-storey extension for a detached house in Ross-on-Wye 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. Professional fees for drawings and the structural engineer are listed separately on our prices page.

Spec	Per m²	A 3 m × 7 m footprint on two floors (42 m² of new floor space)
Essential	£1,890–£2,530 per m²	£79,000–£106,500
Standard	£2,050–£2,750 per m²	£86,000–£115,500
Premium	£2,460–£3,300 per m²	£103,500–£138,500

Planning and building regulations in Ross-on-Wye

In England, a two-storey rear extension on a detached house can be permitted development within 3 m of the original rear wall and at least 7 m from the rear boundary, with matching roof pitch and materials, outside protected areas. Any two-storey side or wraparound extension needs planning permission, costing £548 (or £575 for applications made from 8 December 2026), with a decision due within 8 weeks of validation.

Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.

Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.

Design points for Ross-on-Wye homes

Choosing the best side

On a detached house you can often extend on either side or the rear. We look at orientation for daylight, where the stairs and landing are, the distance to each boundary, drains and trees, so the extension goes where it adds the most useful space.

Keeping it subordinate

Large detached houses can take a large extension, but councils still expect it to look secondary to the main house. A lower ridge, a modest set-back at the front and matching materials keep the proportions right, even on a wide plot.

How we'd run your project

Visit and first ideas
One of our team visits your house in Ross-on-Wye, checks the walls, roof and drains, and sketches out options with you.
Get it approved
Once you're happy with the design we submit it to the council for Ross-on-Wye and deal with any questions from the planning officer.
Technical design
We prepare the building regulations drawings, structural calculations and specification so the build price can be fixed.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.

Questions about two-storey extensions for detached houses in Ross-on-Wye

Which postcodes do you cover around Ross-on-Wye?

We cover Ross-on-Wye (HR9) and nearby places including Cinderford, Ledbury and Belmont (Herefordshire), plus the rest of Herefordshire. The first site visit is free.

How much does a two-storey extension for a detached house cost in Ross-on-Wye?

Our guide for the West Midlands, which covers Ross-on-Wye, is £2,050–£2,750 per m² including VAT. A typical project with a 3 m × 7 m footprint on two floors (42 m² of new floor space) comes to about £86,000–£115,500. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.

Who handles building regulations for a project in Ross-on-Wye?

We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.

Is a detached house extension a better investment than moving?

It often costs less than the gap between your house and a larger one nearby, once property tax, legal fees and removal costs are counted, but that depends on your area. Extending also has limits: every street has a ceiling price. We give you build costs so you can compare them with local asking prices.

Can I extend a detached house on both sides?

Sometimes. With planning permission, a council may accept extensions on both sides if the house stays well proportioned and keeps gaps to the boundaries. It is more common to extend on one side and the rear, or with a wraparound. We look at the plot as a whole before suggesting more than one extension.

Nearby

The same service in neighbouring towns:

Other extensions in Ross-on-Wye

All two-storey extension services in Ross-on-Wye · Two-storey extensions for detached houses across Herefordshire

Want a figure first? Try our guide price tool, then book a free visit to firm it up.