I.C Developments, Design & Build
Roof and chimney repair work underway on an older Surrey property
Areas we cover

Builders in Dorking, under Box Hill.

New builds, extensions, refurbishments, loft conversions, kitchens and bathrooms and period restoration across Dorking, Westcott, the Holmwoods and the villages of RH4 and RH5. One team, one point of contact, building since 1996.

CHAS Accredited SSIP Assessed Fully Insured Building since 1996
Dorking, RH4 and RH5

A market town wedged into a gap in the Downs, with the Surrey Hills on three sides and a High Street still following its old narrow plots. Dorking rewards a builder who slows down and looks.

Dorking sits in the gap where the River Mole cuts through the North Downs, with Box Hill rising straight up on one side and the greensand ridge running away west towards Ranmore, Wotton and Leith Hill. Almost all of RH4, and nearly every village in RH5 around it, falls inside the Surrey Hills Area of Outstanding Natural Beauty. That single fact shapes more building work here than anything else. The town itself is compact and old. The High Street, West Street and South Street still follow the tight plots they were laid out on centuries ago, so frontages are narrow, back gardens are long and thin, and rear access is often through an archway or a shared yard. Around that core the Victorian and Edwardian town climbs the slopes towards Rose Hill, Cotmandene and Ashcombe Road, while the later estates fill in south towards Goodwyns and Chart Downs.

No two Dorking projects look alike, because the housing stock changes every few hundred yards. Along West Street and South Street there are Georgian and earlier frontages with much older timber frames hiding behind them, plenty of them listed, and full of surprises the moment you open up a ceiling. The villas around Rose Hill, Cotmandene and Hampstead Road are Victorian and Edwardian, generously built, with high ceilings, deep bays and roof spaces that take a dormer well. Out along the Reigate Road and towards Milton Heath the 1930s semis have the same familiar shape we see right across Surrey, which makes them natural candidates for a side return, a rear extension or a hip to gable loft. Goodwyns and Chart Downs are solid post war family housing that responds very well to a full internal refit. At Pixham and around the three stations, the newer homes usually want space added rather than fabric repaired.

Materials matter more here than in most Surrey towns. Dorking is built on greensand and largely built out of it, so you find Bargate stone, honey coloured local sandstone, knapped flint with brick dressings and hung clay tiles all on the same street. Greensand is soft and porous. Pointing it up in hard cement traps water inside the wall and the face begins to blow, so we use lime where lime belongs, and we say so at quotation stage rather than after the scaffold is up. The ground changes as you cross the town as well. Chalk along the northern edge below Box Hill, greensand through the middle, then Weald clay as you drop south towards North Holmwood and Capel, which shrinks and swells with the seasons and with the mature trees standing over it. There are old sand workings beneath parts of the town centre too. None of that is a problem if you check first. All of it is a problem if you do not.

Planning goes through Mole Valley District Council. Dorking has conservation areas covering the town centre, Deepdene and the older residential streets, and there are more out in the villages at Westcott, Brockham and Mickleham. Sitting over the top of all of it is the AONB designation, which quietly changes the conversation from what you are allowed to build to what the finished thing will look like from the hills. Bulk against the original house, roof pitch, ridge height, window proportions and materials all get looked at closely, and a design that would pass without comment on a suburban estate can be turned down here on appearance alone. Green Belt covers much of the land between the villages, and permitted development rights are restricted on some properties, so what your neighbour managed five years ago may not apply to you. We check the constraints on your address before we price anything.

We are based in Reigate, a straight run west along the A25, and we have been building across this part of Surrey since 1996. We work alongside architects and designers rather than employing them, so you are welcome to bring your own drawings, or we can put you in touch with people we have worked with for years. After that it is one team and one point of contact, from the soil in the ground to the keys in your hand. We are CHAS accredited, SSIP assessed and fully insured. We price honestly, we keep the site swept and the neighbours informed, and we tell you what is happening next before you have to ring and ask.

What we do in Dorking

Six services, one team.

From a listed frontage on West Street to a 1930s semi on the Reigate Road, the same people design it, build it and finish it.

Local coverage

Villages and neighbourhoods we cover.

Dorking is the centre of it, but most of our work here runs out along the A25 and up the lanes into the Surrey Hills. If you are nearby and not on the list, ask us anyway.

Dorking and its neighbourhoods

  • Dorking town centre, RH4
  • Rose Hill and Cotmandene, RH4
  • Milton Heath, RH4
  • Goodwyns, RH4
  • Pixham, RH4
  • Deepdene, RH5
  • Chart Downs, RH5

North and west, under the Downs

  • Westcott, RH4
  • Westhumble, RH5
  • Mickleham, RH5
  • Box Hill, RH5
  • Ranmore Common, RH5
  • Coldharbour, RH5
  • Wotton, RH5

East and south, into the Weald

  • Brockham, RH3
  • Betchworth, RH3
  • North Holmwood, RH5
  • South Holmwood, RH5
  • Beare Green, RH5
  • Capel, RH5
  • Newdigate, RH5
Recent work

From the ground up.

The parts nobody ever sees, and the part everybody does. Click any photo to see it larger.

Groundworks and foundations being laid on a new build site in Surrey
Groundworks and foundations
New timber roof structure going on over a steel beam during a build
New roof structure over steel
A finished I.C Developments home in Surrey with a landscaped garden and mature planting
Finished home and garden
Why us

Why homeowners in Dorking choose us.

Good to know

Building in Dorking, answered.

Do we need planning permission for an extension in Dorking?
It depends on the house and where it sits. A good number of single storey rear extensions in Goodwyns, Chart Downs and along the Reigate Road fall under permitted development, which is quicker and cheaper. Anything inside the town centre, Deepdene or Rose Hill conservation areas, anything listed, and anything out in the open countryside between the villages will normally need a full application to Mole Valley District Council. Permitted development rights are restricted on some properties here too, so we check what actually applies to your address before we price the work.
What does the Surrey Hills AONB mean for our design?
Almost all of Dorking and the villages around it sit inside the Surrey Hills Area of Outstanding Natural Beauty, so appearance carries real weight. Planners look at how big the new part is against the original house, the roof pitch and ridge height, the window proportions and above all the materials. Bargate stone, flint, hung clay tiles and matched brick tend to be welcomed. Large expanses of render or off the shelf modern cladding usually are not. It rarely stops a project. It does mean the design needs proper thought at the start, which is why we work alongside architects and designers who know Mole Valley well.
How long does a project in Dorking usually take?
A kitchen or a bathroom is normally a few weeks. A single storey extension runs from around two to four months on site. A loft conversion is usually eight to twelve weeks. A full refurbishment or a new build is measured in months rather than weeks. Approvals sit in front of all of that, and in a conservation area or on a listed building the paperwork stage takes longer than most people expect. We give you a programme covering both the approvals and the build before anything starts.
Access and parking on our road are difficult. Can you still work there?
Yes. The old streets around the High Street and West Street have tight frontages, shared yards and very little kerb space, and the lanes out towards Coldharbour, Ranmore and Westcott are narrow and steep in places. We visit before we quote and work out where the skip, the deliveries and the vans are going to sit. Where a permit or a suspended bay is needed we arrange it, and we let your neighbours know what is coming and when. Keeping people on side matters as much as keeping to the programme.
Who signs off the building control side of the work?
Building control is a separate process from planning. Your project is inspected either by Mole Valley District Council or by an approved inspector, whichever suits the job best. We book the inspections, meet the inspector on site at each stage and hand you the completion certificate at the end, along with the paperwork for any guarantees. It matters years later when you come to sell or remortgage, so it is worth having done properly.
Do you cover the villages around Dorking?
We do. Westcott, Brockham, Betchworth, Mickleham, Westhumble, Box Hill, Ranmore, Coldharbour, North and South Holmwood, Beare Green, Capel and Newdigate are all inside our normal working area. We are based in Reigate, a short run east along the A25, which means our team is on site early and it is the same faces coming back each day rather than whoever happened to be free that morning.
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Let’s build something lasting.

from the soil in the ground to the keys in your hand