Part single, part two-storey extensions in Saundersfoot
Adding a part single, part two-storey extension in Saundersfoot gives you two new rooms stacked on one footprint. Here's how we'd approach it, what it typically costs and the rules that apply in Wales.
Before you start in Saundersfoot, here's what applies.
- Postcode districts
- SA67, SA68 and SA69
- County / area
- Dyfed, Wales
- Price region
- Wales
- Guide price
- £66,000–£91,000 (£1,840–£2,530 per m²)
- Approval route
- It may be permitted development if the ground floor goes no more than 4 m and the first floor no more than 3 m beyond the original rear wall, with the first floor 10.5 m from the rear boundary.
- Nearest towns
- Tenby (2.5 miles), Pembroke (9.3 miles), Pembroke Dock (10.3 miles)
- Distance to Llanelli
- about 23.2 miles
- First visit
- Free, no obligation
About a part single, part two-storey extension
A part single, part two-storey extension is an extension where the ground floor is wider or deeper than the floor above, so only part of it rises to two storeys. It usually gives a large kitchen or living area with roof lights below and one bedroom or bathroom above. It is often a good way to add space while limiting the effect on neighbours.
We cover postcode districts SA67, SA68 and SA69 in and around Saundersfoot, along with neighbouring Tenby, Pembroke and Pembroke Dock.
What it costs in Saundersfoot
In Wales, which includes Saundersfoot, we'd expect a part single, part two-storey extension to cost around £66,000–£91,000 for a 6 m × 4 m ground floor and a first floor over half of it (36 m² in total), or £1,840–£2,530 per m² including VAT. Keep a contingency of around 10% for things nobody can see until the ground is opened up.
| Spec | Per m² | A 6 m × 4 m ground floor and a first floor over half of it (36 m² in total) |
|---|---|---|
| Essential | £1,690–£2,330 per m² | £61,000–£84,000 |
| Standard | £1,840–£2,530 per m² | £66,000–£91,000 |
| Premium | £2,210–£3,040 per m² | £79,500–£109,500 |
Planning and building regulations in Saundersfoot
In Wales, a part two-storey rear extension can be permitted development if the first floor goes no more than 3 m and the ground floor no more than 4 m beyond the original rear wall, with the first floor at least 10.5 m from the rear boundary. Conservation areas and other protected areas are excluded. If the design falls outside these limits, a householder application costs £585.
Approval in Wales: Householder planning application: £585. Councils normally decide householder applications within 8 weeks.
Building regulations: Building regulations approval under the Welsh Approved Documents, which differ from England's in places (notably energy efficiency).
Design points for Saundersfoot homes
Structure at the step
The first-floor wall above often sits over the new open-plan space, so it needs a steel beam or frame to carry it. Loads come down at different points than in a full two-storey design, and the engineer sizes the foundations to suit each part.
Where to put the two-storey part
The two-storey section usually works best away from the closest neighbour, with the single-storey part on that boundary side. We test a few positions against neighbours' windows, the upstairs layout and the roof shape before choosing the one to take forward.
How we'd run your project
Look at the house
We start in Saundersfoot with a free visit: measurements, photos, a look at the loft and drains, and a frank chat about budget.
Drawings, then consent
We draw the scheme, check it against the rules in Wales, and take it through the right consent with the council.
Price it properly
Once the engineer's calculations are in, we fix the build price in writing, with a clear list of what's included.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.
Questions about part single, part two-storey extensions in Saundersfoot
Who handles building regulations for a project in Saundersfoot?
We handle it as part of the project. What's needed in Wales: building regulations approval under the Welsh Approved Documents, which differ from England's in places (notably energy efficiency). We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.
How much does a part single, part two-storey extension cost in Saundersfoot?
Our guide for Wales, which covers Saundersfoot, is £1,840–£2,530 per m² including VAT. A typical project with a 6 m × 4 m ground floor and a first floor over half of it (36 m² in total) comes to about £66,000–£91,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Which postcodes do you cover around Saundersfoot?
We cover Saundersfoot (SA67, SA68 and SA69) and nearby places including Tenby, Pembroke and Pembroke Dock, plus the rest of Dyfed. The first site visit is free.
Can the single-storey part be deeper than the two-storey part?
With planning permission, yes, and that is often the point of the design: the ground floor projects further into the garden while the first floor stays back from neighbours. Under permitted development, the depth limits for extensions of more than one storey can apply to the whole extension, so we confirm which route applies before drawings are finalised.
Which side should the two-storey part go on?
Usually the side furthest from the nearest neighbour's windows, so the single-storey part sits nearest them and keeps their light. Other factors are where the stairs land upstairs, which room needs the extra space and where drains run. We sketch options at the design stage and explain which is most likely to be approved.
Nearby
Other towns near Saundersfoot:
Other extensions in Saundersfoot
- Rear
- Side
- Wraparound
- Over a garage
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Saundersfoot · Part single, part two-storey extensions across Dyfed
Tell us about your house in Saundersfoot and we'll call you back to arrange a free, no-obligation visit.