Rear, side and wrap-around extensions for Mitcham’s inter-war semis, Edwardian terraces and ex-council houses.
We build extensions across Mitcham and CR4, from Figges Marsh and Eastfields to the streets around Cricket Green and Pollards Hill. Mitcham is in the London Borough of Merton, so planning and building control go through Merton Council. Much of the housing here is inter-war semis and terraces, which often have room at the side as well as the back, so we look at both before suggesting a design.
On a semi-detached house, the space beside the house is often the best place to add room. A single-storey side extension can take in a utility room, a WC or a wider kitchen, and a two-storey side extension can add a bedroom above. At the back, a full-width single-storey extension usually turns a separate kitchen and dining room into one space.
The rules differ by type. A single-storey rear extension is often permitted development, and a single-storey side extension can be too if it is no wider than half the original house. Any side extension of more than one storey needs planning permission from Merton, as does most work in a conservation area and any extension to a flat.
Typical build: 10 to 16 weeks on site
Council: Merton planning and building control
Common here: Side and rear extensions on semis
Covered: CR4, plus SW16 around Pollards Hill and Longthornton
Most Mitcham houses suit one of these, and some suit two.
The Cricket Green conservation area covers Mitcham’s historic core around Lower Green, including Church Road, Cricket Green, Cranmer Green, Three Kings Piece and Mitcham Park. It has Georgian and Victorian villas, cottages and a number of listed buildings. Inside it, side extensions and rear extensions of more than one storey need planning permission, and listed buildings need listed building consent as well.
If your house was bought from the council, for example on or near estates such as Pollards Hill, Eastfields or Phipps Bridge, the title deeds may contain restrictions that need the council’s or a housing association’s consent before building work. Flats on these estates usually need the freeholder’s permission too. We ask you to check your deeds or lease early so the project isn’t held up.
We measure up, look at side and rear options and send a written quote.
Drawings, structural calculations, and permitted development, prior approval or a Merton planning application.
Foundations, walls, roof and finishes by our trades, with party wall notices served first.
Building control completion and a final walk-round with you.
A single-storey side extension can be permitted development if it is no wider than half the original house and no taller than four metres. Anything bigger, any two-storey side extension, and any side extension in the Cricket Green conservation area need planning permission.
Often, with planning permission. Merton will look at how it sits beside your neighbour and the street, so designs are usually set back from the front and lower at the roof. We prepare the drawings and the application.
Usually, yes. Check your title deeds for any restriction that needs the council’s or a housing association’s consent, and we can provide drawings to support the request.
Under the Party Wall Act you must notify them, and they can consent or appoint a surveyor. On a semi or terrace this is normal, and we prepare and serve the notices.
Typically four to six months: a few weeks for drawings, up to eight weeks for approvals, then 10 to 16 weeks on site.
Rear Extensions is one of ten building services we offer across Mitcham and CR4. If your project needs more than one, we run them as a single job.
Tell us about your property and preferred timeline and we will get you a quote.
