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Open-plan ground floor with large-format marble-effect floor and bifold doors by RenovationPlanltd

Building work · Chelmsford

Builders in Chelmsford

Every job we run in Chelmsford starts with the parts you will never see again: foundations dug to the depth the ground actually needs, steels sized by an engineer with padstones and fire protection, and a weathertight roof before a single plasterboard sheet arrives. Finishes are the easy part once the shell is right.

48 five-star reviews 25+ years since 2001 £5m public liability Fixed written quotes

Structure first, finishes last

Every job we run in Chelmsford starts with the parts you will never see again: foundations dug to the depth the ground actually needs, steels sized by an engineer with padstones and fire protection, and a weathertight roof before a single plasterboard sheet arrives. Finishes are the easy part once the shell is right.

The CM1 to CM3 building stock

Chelmsford is mostly Victorian Moulsham terraces, 1970s Chelmer Village housing and new-build stock at Beaulieu Park, and each of those wants a different approach. We survey what is there — wall construction, floor build-up, drain runs, roof type — and price from that, so the quote reflects your house rather than a generic square-metre rate.

One team, one programme

You deal with Gabriel from the first site visit to the final snag. Trades are sequenced in writing — groundwork, structure, roof, first fix, plaster, second fix, decoration — so nobody turns up to a job that is not ready and the Chelmsford programme does not drift by a month.

Building control and paperwork

Building regulations approval, structural calculations, party wall notices where a shared wall is involved and Chelmsford City Council conditions are all handled as part of the job. You get the inspection sign-offs and certificates at the end, which is what a solicitor asks for when you sell.

Building work across Chelmsford

Chelmsford is around thirty-five minutes east of Bishop's Stortford, so CM1 to CM3 work is booked as continuous days with materials delivered ahead of the trade that needs them. Small structural jobs run one to two weeks, a single-storey extension eight to twelve, and a full refurbishment two to four months.

Rear extension with roof lantern and bifold doors built by RenovationPlanltd
Rear extension with roof lantern and bifold doors built by RenovationPlanltd
Insulated garden room office built in Essex by RenovationPlanltd
Insulated garden room office built in Essex by RenovationPlanltd

What you get

Included as standard

GroundworkTrial holes where needed, foundations to the depth the ground and trees require, heave protection and new drainage runs with proper access
StructureEngineer-designed steels and padstones, propping to a written sequence, cavity trays and insulated cold-bridge details
RoofWarm flat roof with a single-ply or GRP finish, or a pitched roof matched to the existing tile, with lanterns and roof lights flashed properly
First fixFull rewire or new circuits, plumbing and heating to current regulations, MVHR or extract ventilation where required
FinishingSkimmed walls, hardwood or engineered floors, joinery, tiling and decoration by the same team that built the shell
HandoverBuilding control sign-off, structural calculations, certificates, manufacturer warranties and a snag list closed out before final payment

Prices

What building work normally costs

Single-storey rear extension (shell + standard finishes)£1,700 – £2,300 per m²
Two-storey side or rear extension£1,900 – £2,500 per m²
Structural opening with steel beam£2,400 – £4,800
Loft conversion with dormer and staircase£38,000 – £62,000
Garage or outbuilding conversion£14,000 – £26,000
Full house refurbishmentfrom £68,000

Rates cover labour, plant and standard materials for the shell and finishes described. Kitchens, sanitaryware, glazing and flooring are quoted as their own lines so you can choose the specification freely. Groundwork depth, drainage diversions and steelwork are itemised separately because they are the items that vary most from house to house — pretending otherwise is how builders end up asking for more money halfway through.

Local detail

Building work across Chelmsford and the surrounding CM postcodes in Essex

Moulsham and central terraces

Older central terraces have solid walls, suspended timber floors and rear additions built in three phases. Structural openings here need careful propping and a check on what the existing wall is actually carrying before anything is cut — we survey rather than assume.

1970s and 1980s estate housing

Chelmer Village and similar estates have thin cavity walls, trussed roofs and small original kitchens. They extend cheaply and well, but the roof cannot simply be cut into: a trussed roof needs designed alterations, and we include the structural engineer's input in the price.

New-build alterations at Beaulieu Park

Newer homes often need a garden room, a media wall or a knock-through rather than an extension. Warranty conditions and service routes in block-and-beam floors both matter, so we locate services before drilling and keep the warranty intact.

Towns and villages covered

Questions

What people ask before booking

What does an extension cost in Chelmsford?

A single-storey rear extension in CM1 to CM3 typically runs £1,700 to £2,300 per square metre for the shell and standard finishes, with kitchens, bathrooms and glazing priced separately. Groundwork, drainage and steelwork are itemised so you can see where the money goes.

Do you give fixed prices or estimates?

Fixed written prices, itemised stage by stage, once we have drawings or a measured survey. Where something genuinely cannot be known until the floor comes up, we say so and set a provisional sum rather than hiding it in the total.

Are you insured and do you offer any guarantee?

Yes — public liability insurance, and a workmanship guarantee on structural and finishing work. Manufacturer warranties on windows, roofing and boilers are passed to you with the completion paperwork.

How soon can you start in Chelmsford?

Lead time for Chelmsford building work is currently around four to eight weeks for larger projects, and smaller structural jobs can often fill a slot sooner. Sending drawings early is what secures a date.

Do you handle planning and drawings?

We work with architects and structural engineers we trust and can introduce you, or build from drawings you already have. We check consented drawings against what will actually build on site before pricing.

Can we live in the house while you build?

Usually, yes. We seal the working zone with dust protection, keep a clean route through the house, maintain water and heating wherever possible, and give you a weekly plan of what is happening next.

Will you take on work another builder abandoned?

Regularly. We survey what has been done, tell you honestly what has to come out and what can be kept, and price the finish as a fresh job with its own guarantee.

Do you already work in Chelmsford?

Yes — we have been tiling in CM1 to CM3 for years, and we now take on full building work there too: extensions, structural openings, refurbishments and garden rooms.

Not answered here? Send a photograph and a postcode on WhatsApp and you will normally get a straight answer the same day.

Proof

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Get a fixed building price for your Chelmsford project

Send your drawings, or photographs and rough dimensions if you do not have any yet. Gabriel will visit, tell you what the job genuinely involves and price Chelmsford work in writing, stage by stage, with no surprises on the final invoice.

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