Maidenhead, Berkshire
Side return extension in Maidenhead
Infilling the narrow passage beside a Victorian or Edwardian back addition. If you live in Maidenhead and want to know what a side return extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Maidenhead sits in Berkshire, with postcode districts including SL6. Side returns suit the Victorian and Edwardian terraces found across parts of Berkshire, where the kitchen sits in a narrow back addition.
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 side return extension cost in Maidenhead?
In Maidenhead, our guide for a side return extension is £2,580–£4,260 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £31,000–£51,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £45,000–£74,500 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a side return extension in Maidenhead?
Here is how the rules in England apply to a side return extension in Maidenhead.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Maidenhead like to extend?
Around Maidenhead the housing ranges from inter-war semis to 1960s and 1970s estates with good-sized gardens. Many of the newer estates had permitted development rights removed by condition, so we check the planning history before anything is drawn.
How a side return extension in Maidenhead comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Side return extensions near Maidenhead
We also build side return extensions in nearby Burnham (2.5 miles) and Marlow (4.0 miles).
- Side return extension in Burnham
- Side return extension in Marlow
- Side return extension in Slough
- Side return extension in Windsor
- Side return extension in Beaconsfield
Other work in Maidenhead:
FAQ
Side return extension questions in Maidenhead
Do I need planning permission for a rear extension in Maidenhead?
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.
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.
How much space does a side return add?
Typically 8 to 18 square metres, enough to turn a galley kitchen into a kitchen-diner with an island.
What postcode areas do you cover around Maidenhead?
Including SL6, and the surrounding Berkshire area.
Is the site visit in Maidenhead free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How long does a rear extension take to build in Maidenhead?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.