I.C Developments, Design & Build
A completed brick home with dormer windows under a blue sky, built by I.C Developments
Areas we cover

Builders in Merstham, done properly.

Extensions, loft conversions, refurbishments, kitchens and bathrooms, new builds and period restoration across Merstham and the villages around it. One team, from the first survey to the last coat of paint.

CHAS Accredited SSIP Assessed Fully Insured Building since 1996
Building in Merstham

Merstham is really two villages in one. The old lanes around Quality Street, and the streets that grew up after the war. We build in both.

Merstham sits at the top of the borough, north of Redhill, where the last of the town gives out and the chalk of the North Downs takes over. The M25 crosses just above the village at junction 8 and the M23 peels away beside it, which makes it one of the easiest places in Surrey to reach and one of the trickier ones to build in quietly. We have been working in and around this village for years from our base a few minutes down the road in Reigate, so we know the streets, the ground and the people who sign things off.

The housing here is unusually varied for a village of its size. The historic core along Quality Street holds listed and period cottages, tile hung and timber framed, sat behind low walls on a lane that has barely changed shape in a century. Around the church and the old high street there are Victorian and Edwardian cottages. Then, spreading south and east, there is the large 1950s Merstham estate, laid out after the war with generous plots, wide verges and solid brick and render houses. Add the interwar semis near the station and the bigger detached homes climbing Rockshaw Road onto the downs, and you have four or five entirely different building jobs inside one postcode.

That variety is the reason we like working here. A 1950s estate house is a gift for an extension or a loft conversion. The plots are deep, the rooflines are simple, and there is normally room to go out the back and up into the roof without upsetting anybody. The interwar semis around Frenches Road and Albury Road usually want the same thing that Surrey semis everywhere want, which is the back opened up into one bright kitchen and dining room with proper glazing onto the garden. The period cottages closer to Quality Street want the opposite approach, which is patience, lime mortar and repair before replacement.

The ground deserves a mention too, because Merstham is not ordinary digging. This is chalk and firestone country, and the village was quarried and mined for building stone long before it was a commuter village. Parts of it have old workings underneath, and the land rises steeply towards the downs, so plots can slope more than they look on a drawing. None of that stops good work happening, but it does mean we would rather spend a day on trial holes and a proper site investigation than guess at a foundation and find out the hard way.

Planning here goes through Reigate and Banstead Borough Council, and there is a conservation area covering the historic heart of the village around Quality Street. Green Belt and the protected downland landscape sit right on the doorstep to the north and west, at Gatton, Alderstead Heath and up towards Chipstead. All of that shapes what will and will not get through, and we would rather tell you that at the kitchen table on the first visit than let you find out six months and one refusal later. We work alongside architects and designers, and if you do not have one, we can introduce you to people we trust.

What we do here

Six services, one team.

Whatever the job, it is the same firm from the first drawing to the final handover. Here is what that looks like on a Merstham street.

Local coverage

Villages and neighbourhoods we cover.

Merstham is our starting point, but the work spreads out along the downs and back down the hill towards Reigate and Redhill. These are the places we are in most weeks.

Merstham and the village

  • Merstham village and Quality Street, RH1
  • South Merstham, RH1
  • Rockshaw Road and the downs slope, RH1
  • Battlebridge Lane and Albury Road, RH1
  • Frenches Road and the station streets, RH1
  • Alderstead Heath and Warwick Wold, RH1

North, over the downs

  • Hooley, CR5
  • Netherne on the Hill, CR5
  • Chipstead, CR5
  • Mugswell, CR5
  • Coulsdon, CR5
  • Woodmansterne, SM7
  • Chaldon, CR3

South and west, towards Reigate

  • Gatton and Gatton Park, RH2
  • Redhill, RH1
  • Nutfield and South Nutfield, RH1
  • Bletchingley, RH1
  • Reigate and Woodhatch, RH2
  • Banstead and Nork, SM7
  • Kingswood and Lower Kingswood, KT20
  • Tadworth and Walton on the Hill, KT20
On site

How the work goes.

Structure first, then the brickwork, then the finish. Click any photo to see it larger.

Steel beams and new blockwork walls going up on an I.C Developments project in Surrey
Steel and blockwork
Close up brickwork detail on an I.C Developments build in Surrey
Brickwork detail
A finished family home completed by I.C Developments in Surrey
Finished and handed over
Why us

Why homeowners in Merstham choose us.

No sales patter. Just the handful of things that actually make a build go well.

Good to know

Merstham questions.

The things people ask us most before work starts in this part of Surrey.

Do I need planning permission for an extension in Merstham?
Not always. Reigate and Banstead Borough Council is the planning authority for Merstham, and a good number of single storey rear extensions on the post war streets fall under permitted development. Larger, double storey or front facing work usually needs a full application. Homes inside the Quality Street conservation area, and anything in the Green Belt on the downs, have tighter rules and fewer permitted development rights. We look at your house early, tell you which route applies, and handle the paperwork either way.
We live in an older cottage near Quality Street. Can you work on listed and conservation area homes?
Yes. A good part of our work is on older Surrey property, and the village core around Quality Street is exactly the sort of place that needs a careful hand. Listed buildings need listed building consent as well as planning, and that is a separate process we will guide you through, working alongside your architect or designer and the conservation officer. On site it means lime mortar rather than cement, salvaged or hand made bricks and tiles where we can get them, and repair before replacement.
Who signs the work off, and is the ground in Merstham a problem?
Structural work goes through building control, either with the borough council or an approved inspector, with inspections at foundation, damp course, drainage, structure and completion stages. Merstham sits on chalk downland and parts of the village have old firestone and hearthstone workings beneath them, so foundations here deserve proper thought rather than a standard detail. Where there is any doubt we arrange a site investigation and design the foundations to suit what is actually under your garden.
Where will your team park, and how do you manage access on the narrow roads?
We agree it with you before the first van arrives. The older lanes around Quality Street and the tighter terraced streets near the station will not take a row of vehicles, so we keep numbers down, car share where we can, and use a grab lorry or smaller loads rather than blocking the road with a full artic. Deliveries are timed to miss the school run and the worst of the A23. We sweep up at the end of every day, and we speak to your neighbours ourselves rather than leaving you to smooth it over.
How long will the work take?
A loft conversion in a Merstham semi is usually somewhere between six and ten weeks on site. A single storey rear extension runs from roughly two to four months, and a wraparound or double storey longer. A full house refurbishment is normally three to six months, and a new build considerably more. We give you a written programme before we start and keep you updated week by week, so you always know what is happening next.
Do you cover the villages around Merstham?
We do. As well as Merstham and South Merstham, RH1, we work in Hooley, Netherne on the Hill and Chipstead, CR5, at Gatton, RH2, and across Redhill, Nutfield and Bletchingley, RH1. Our base is in Reigate, so the whole of this area is a short drive for us. If you are just outside it, ask anyway. We would far rather have an honest conversation than turn good work away.
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Let’s build something lasting.

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