Builders in Chelmsford, Essex
Most builders will tell you they cover Chelmsford. Fewer can show you what they have finished here. We turned an irregular bungalow into a two-storey family home with an air source heat pump and solar PV, a £300,000 build over eight months, and we have been working across Chelmsford, Writtle and the villages for more than twenty years. Extensions, renovations, kitchens, bathrooms, lofts and new builds, all run by one team on a fixed price.

Building in and around Chelmsford
Local Builders You Can TrustChelmsford is its own planning authority, which is the first thing worth knowing. Your application goes to Chelmsford City Council, and the same council covers Writtle, Great Baddow, Springfield, Broomfield, Galleywood, Danbury, Boreham, Stock, Ingatestone and South Woodham Ferrers. If you live in one of those villages, the rules on your extension are Chelmsford rules.
The second thing is that Chelmsford is not one housing market. A Victorian terrace off Moulsham Street, a 1930s semi in Springfield and a five-year-old house at Beaulieu Park need different work, need different permissions and cost different money. Anyone quoting all three the same way has not looked properly.
Belvia is a construction company rather than a one-trade outfit, which matters most on the jobs that involve structure. Steel goalposts for open-plan living, first-floor additions on an existing footprint, NICEIC-certified electrics, Gas Safe plumbing, insulation and airtightness detailing that meets current U-values, and Building Control signed off at the end. One point of contact runs the job from the first survey to handover, with photo updates as it moves.
Our biggest Chelmsford project so far took a bungalow, extended it on every side, then removed the roof and built a new first floor: three more bedrooms, a bathroom, a full rewire and replumb, an air source heat pump and solar PV, finished in eight months at £300,000. In Writtle we completed a ground-floor refurbishment with a garage conversion and a silicone-rendered facade, £155,000 over fourteen weeks. Both are on the site with photographs and the full scope of works.
Peace of mind
Fully insured, with every project signed off to Building Regulations.
A tidy, predictable process
Clear timelines, clear communication and a clean site, start to finish.
Built to last
Proper foundations and correct structural detailing, not shortcuts.
Building services we offer in Chelmsford
Dedicated to bringing your home renovation dreams to life, whether it's a kitchen remodel, a bathroom upgrade, a house extension, or a bespoke loft conversion.
House Extensions
Rear, side return, wraparound, single and double storey. Chelmsford extensions are usually about opening the back of the house up, and that is a structural job before it is a decorative one.
- Rear, side return and wraparound extensions
- Single and double-storey additions
- Open-plan conversions and structural wall removals
- RSJ installations and load-bearing support
- Full planning, design and build service

Kitchen Renovations & Extensions
Whether you’re reconfiguring your layout or extending to create a larger open-plan space, we handle every detail from design to installation.
- Kitchen extensions and open-plan conversions
- Wall removals and structural reinforcements
- Bespoke kitchen fitting and finishes
- Electrical, plumbing, and tiling works
- Integrated appliance installation

Loft Conversions
We turn unused lofts into bright, functional living spaces, from master suites to home offices with expert attention to structure, insulation, and finishes.
- Dormer, Velux, and hip-to-gable conversions
- Structural reinforcement and insulation
- Staircase design and installation
- Electrical, plumbing, and plastering
- Building Regulations compliance

Bathroom Renovations
Transform your bathroom into a luxurious retreat our bespoke bathroom renovation services.
- Full bathroom renovations and refits
- Walk-in showers and wet rooms
- Plumbing, tiling, and electrical work
- Bespoke joinery and fittings
- Underfloor heating installations

New Builds & Custom House Construction
Build a bespoke home from the ground up. From plot development and replacement dwellings to self-build construction support across Essex.

Home Renovations & Property Refurbishments
Transform your existing home with a full renovation, ground floor reconfiguration, or multi-room refurbishment. We manage every trade from strip-out to handover.

Garage Conversions
Convert your garage into a living room, office, or guest suite with our end-to-end managed conversions.
- Full or partial garage conversions
- Structural adjustments and insulation
- New flooring, heating, and electrics
- Window and door installations
- Internal finishing and plastering

Garden Rooms
Permanent, fully-insulated garden rooms built in place on proper foundations – offices, gyms, studios and guest rooms usable all year round.
- Insulated to house-extension standards
- Mains power, heating and plumbing options
- Built to your specification, not a catalogue

Planning in Chelmsford (Chelmsford City Council)
Planning for homes in Chelmsford goes through Chelmsford City Council. Four things decide whether your project needs an application, and all four are worth checking before you get attached to a drawing.
- Permitted development covers a lot, until it does not. Many single-storey rear extensions and most loft conversions can be built under PD. But Chelmsford has a series of Article 4 Directions that remove those rights on specific streets, including Meon Close, Wear Drive, Waveney Drive and Tees Road in Springfield, Humber Road and Lawn Lane, land next to The Dell in Great Baddow, and Butlers Farm in Broomfield.
- Newer estates often have PD removed by condition. Chelmer Village, Chancellor Park, Beaulieu Park and Channels were built with conditions that limit what you can add later. The condition sits with the house, not with the general rules, so check your deeds and the original permission.
- There are 26 conservation areas in the district. In the city that includes Moulsham Street, New London Road, Springfield Green, the Central area, Baddow Road and River Can, and West End. In the villages it takes in Writtle, Great Baddow, Broomfield, Danbury, Boreham, Stock and Little Waltham. Inside one, external changes, materials and tree work are all controlled.
- Building Regulations apply either way. Planning and Building Control are two different things. Structural work, drainage, electrics, insulation and ventilation need signing off whether or not you needed planning.
We handle the Chelmsford City Council application and the Building Control side as part of the job.
Chelmsford property types and the work that suits them
The city runs from Victorian terraces to houses finished last year. Here is what each tends to take well.
Happy Customers Across Essex
We're committed to delivering exceptional customer service and we're proud to showcase our client testimonials.
Our Chelmsford service area
We cover Chelmsford and the villages around it: Writtle, Great Baddow, Springfield, Broomfield, Galleywood, Danbury, Boreham, Chelmer Village, Beaulieu Park, Ingatestone, Stock, Margaretting and South Woodham Ferrers, plus Witham, Maldon, Braintree and Brentwood across mid Essex.
Builders in Chelmsford: your questions
Do you cover Chelmsford?
Yes. We work throughout Chelmsford and the surrounding villages, and we have completed projects in the city itself and in Writtle. We will come out for a free, no-obligation survey and give you a fixed-price quote.
Which areas around Chelmsford do you work in?
Writtle, Great Baddow, Springfield, Broomfield, Galleywood, Danbury, Boreham, Chelmer Village, Beaulieu Park, Ingatestone, Stock, Margaretting and South Woodham Ferrers, along with Witham, Maldon, Braintree and Brentwood.
Do you handle Chelmsford City Council planning applications?
Yes. Chelmsford City Council is the planning authority for the city and the surrounding villages. We manage the application, the permitted development assessment and Building Control sign-off as part of the job, including on the Article 4 streets in Springfield, Great Baddow and Broomfield where permitted development rights have been removed.
Can you show me examples of your work in Chelmsford?
Yes. Our largest local project turned an irregular bungalow into a two-storey family home with an air source heat pump and solar PV, £300,000 over eight months. In Writtle we completed a ground-floor refurbishment, garage conversion and facade uplift at £155,000 over fourteen weeks. We have also refurbished two school washroom blocks in the city. All are on our projects page with photographs.
What does an extension cost in Chelmsford?
It depends on size, structure and finish, and anyone giving you a number before they have seen the house is guessing. For scale, our completed local work runs from a £12,000 washroom refurbishment to a £155,000 ground-floor refurbishment and a £300,000 whole-house expansion. We survey the property, price it properly, and the fixed price we give you is the price you pay.
Do you do commercial work in Chelmsford?
Yes. Schools, offices, boardrooms and washroom facilities, including work programmed into half-term and out-of-hours slots so the building keeps running. See our commercial services.
Are you insured, and do you give fixed-price quotes?
Yes to both. We are fully insured, every project is signed off to Building Regulations, and you get a detailed scope of works and a fixed price before anything starts.



