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Open-plan loft living room with a mustard sofa and leather armchairs, looking through to the dining table, an arched alcove and the window beyond

Extensions · Kitchens · Bathrooms

Builders in Horsham & West Sussex

Extensions, kitchens and bathrooms for homes across West Sussex, and fit-out work for commercial premises, handled from design to completion.

  • All work guaranteed
  • Free quotes
  • Based in Broadbridge Heath
  • Over 20 years' experience
Get a quote01403 626156

  • All work guaranteed

    Every job we do is guaranteed, with a minimum of 24 months on labour. The guarantee for your job is written into the quotation.

  • Free quotes

    We come out, look at the job and give you a written quotation, free of charge.

  • Itemised quotations

    In writing, and broken down, so you can see what is in it, and compare it fairly against another builder.

  • One job at a time

    From the first visit to handover, so there is never a question about who is responsible for what.

  • Cleared down daily

    The site is left tidy at the end of each day. Our customers mention this more than anything else.

  • Permissions handled

    Planning where it is needed, building regulations where they apply, and party wall notices served in time.

Your trusted construction partner in Sussex

Carter Cook Construction is led by Christopher, who brings over 20 years of experience in building, renovation and refurbishment projects. We undertake both residential and commercial projects and have extensive experience across both sectors.

Christopher is personally involved throughout every project. You'll receive a detailed, itemised quotation and an agreed programme of works, and work areas are tidied and cleared at the end of every day, something our clients frequently praise.

If you're still exploring ideas and are unsure whether a project is practical or achievable, we're always happy to have an initial conversation before preparing a quotation.

Talk to usMore about us
One of our single-storey rear extensions in Sussex mid-build, with the bifold doors in and the old patio coming up
They were always on time, respectful of my home, and went above and beyond to ensure that the job was done right.
Ellie, Southwater

Services

What we do

Four things make up most of our residential work. Each has its own page, with what the job actually involves.

Inside a finished rear extension, with two rooflights in the ceiling and bifold doors open to the garden

Home Extensions

Single storey, double storey, side return and wrap-around extensions, managed from drawings and permissions through to handover.

Learn more: Home Extensions
TV room in a converted garage in Horsham, with an orange corner sofa, a wall-mounted television and a wood-effect floor

Garage Conversions

Single, double and integral garages turned into a snug, bedroom, office or utility, with the building regulations side handled.

Learn more: Garage Conversions
Pale oak kitchen fitted under a sloping loft ceiling, with a full-height tower of handleless units

Kitchen Fitting

Full kitchen renovations: strip out, first fix, units and worktops, tiling and finishing. We will fit yours or handle the supply.

Learn more: Kitchen Fitting
Shower room lined in green glazed tiles, with a frameless glass screen and a dark wood vanity

Bathroom Fitting

Family bathrooms, en-suites and wet rooms, including tanking, tiling, ventilation and level-access showers.

Learn more: Bathroom Fitting

Loft conversions, commercial fit-out, structural alterations and general building work too. See all services.

Process

How a job runs

The same four stages whether it is a bathroom or a two-storey extension.

  1. Talk it through

    Tell us what you have in mind. We will come and look at the property, and give you an honest view of what is achievable.

  2. A written quotation

    Itemised, so you can see what is included and what is not, and so you can compare it fairly against another builder.

  3. Permissions and drawings

    Planning where it is needed, building regulations approval where it is required, and party wall notices served in good time.

  4. Build and hand over

    An agreed start date and programme, the site cleared down as we go, and a snagging walk-round with you at the end.

Gallery

Recent work

Extensions, annexes, kitchens, bathrooms and joinery, from homes in Horsham, around Sussex, and a loft flat refitted top to bottom.

  • Family bathroom with a bath behind a glass screen, a fluted basin on a cream vanity unit and textured brown wall tile
  • Oak kitchen opening into a living room, with a full-height red built-in cupboard and shelving fitted into the eaves
  • Bespoke charcoal handleless kitchen with a white worktop and breakfast bar, in the final stages of fitting
  • Single-storey rear extension with a tiled roof, two rooflights and bifold doors, with the new paving being laid
  • Study with a gable-shaped oak bookcase built around a daybed
  • Level-access wet room in a Horsham annex, with a zero-step shower behind a glass screen and a recessed niche

See more projects

What our customers say

Reviews from homeowners and businesses we have worked for.

I recently had the pleasure of having Carter Cook lay new tiles in my kitchen, and I couldn't be happier with the results! From start to finish, Chris was a true professional, providing excellent communication, attention to detail, and top-notch workmanship. They were always on time, respectful of my home, and went above and beyond to ensure that the job was done right.
Ellie, Southwater
From start to finish, the team at Carter Cook was professional, courteous, and extremely knowledgeable about all aspects of the installation process. They worked closely with me to ensure that every detail was perfect, from the layout and design to the installation of the cabinets, countertops, and appliances.
Jackie, Horsham

FAQs

Common questions

If yours is not here, ask. We would rather answer it before you commit to anything.

Which areas do you cover?

We are based on Cook Way in Broadbridge Heath and work across Horsham and West Sussex, including Southwater, Billingshurst, Storrington, Pulborough, Steyning, Crawley and Chichester. We have also carried out commercial work further afield. If you are just outside that, ask.

Is your work guaranteed?

Yes. All of our work is guaranteed, with a minimum of 24 months on labour, and the guarantee for your job is set out in your quotation. Whoever you hire, get the guarantee in writing before you agree to anything.

Do I need planning permission for an extension?

Often not. Many single storey rear extensions fall under permitted development, which lets you build within set limits without a planning application. Those rights are reduced or removed for flats, listed buildings, conservation areas and streets covered by an Article 4 direction, and they can be used up by a previous extension. Building regulations approval is a separate thing and is always required.

Do you handle the planning and building control side?

Tell us what stage you are at when you get in touch. Some customers come to us with drawings and approvals already in place. If you have not got that far, we can introduce you to architects we trust. We will tell you at quotation stage exactly which permissions your project needs and who is arranging each one, so nothing falls between the two of us.

Who does the electrics and gas?

We bring in registered tradespeople: electricians registered for Part P work, and Gas Safe registered engineers for anything involving gas. Their work is certified, and you get the certificates at the end of the job.

Can you fit a kitchen or bathroom I have bought myself?

Yes. Plenty of people have already ordered from a showroom or online and want a builder to fit it. If you can, send us the plan and the unit schedule before you place the order. It is much easier to catch a problem on paper than when the delivery is in your hallway.

Do you take on commercial work as well as homes?

Yes. Alongside residential projects we have converted commercial premises, including a 6,000 sq ft warehouse fitted out with a new mezzanine floor and full-height partitioned office space, completed while the business stayed open and trading.

How do I get a quote?

Send us the details through the contact form, or call. The more you can tell us up front (rough sizes, a few photos, whether you already have drawings), the more useful our first response will be.

Coverage

Where we work

Based in Broadbridge Heath, working across Horsham and West Sussex.

Areas
Horsham, Broadbridge Heath, Southwater, Billingshurst, Storrington, Pulborough, Steyning, Crawley and Chichester
Hours
Mon–Fri 9am – 5pm