Extensions & structural
Months on site, drawings, building control and every trade managed by us.
- Single and double storey extensions
- Loft conversions
- Garage conversions
- New builds and small developments
Chelmsford · All of Essex · North East London
Webb Construction Services Ltd is a Chelmsford building company. Extensions and loft conversions at one end, a slipped roof tile or a shelf on the wall at the other — and everything in between. One firm, one point of contact, one price agreed in writing before we start.
What we do
Most builders want the big jobs and pass on the rest. We do both. Find the size that matches what you need and you will see what it involves, what it costs and how quickly we can get to it.
Months on site, drawings, building control and every trade managed by us.
Most of what we do. A few days to a few weeks, one trade or two, priced from measurements.
The ones nobody else will turn out for. Booked in, done in a morning, gone.
Where a job needs a certified electrician or plumber, we bring in trades we have used for years and manage them ourselves. One firm, every trade, one price.
Our online estimator prices small and medium jobs on the same labour rates and materials allowances we quote from. No details needed, no sign-up.
Why us
Everyone has heard the story about the builder who took the deposit and disappeared. Here is exactly how we work, so you can judge us before you commit to anything.
A start date is agreed in writing and we work to it. If something moves — weather, materials, building control — you hear it from us first, not after the fact.
Your quote breaks down labour, materials and timescales. No day-rate creep and no "while we were in there" invoices at the end.
You pay against completed stages, not up front. Nobody should be asked to hand over thousands before a wall is touched.
Building regulations, structural calculations and building control inspections arranged and dealt with as part of the job.
Ask and we will give you addresses of recent work locally and the customers' numbers. Go and look at it.
If something fails because of how we fitted it, we come back and put it right at no cost for a full year. We are local, and small jobs later on get the same attention as the big one.
How it works
Ring, or send the form with a few details. For small jobs you can price it yourself online first and skip straight to booking.
We come out at a time that suits, measure up, talk through options and flag anything that will affect cost — drains, levels, structure, access.
An itemised quote with a realistic programme, usually within a few days. No pressure and no obligation.
Start date confirmed, materials ordered, and any building control or structural work arranged before we break ground.
Site kept tidy and secure, neighbours considered, and a straight answer every week on where the job is against the programme.
We walk the job with you, fix the snag list, clear the site and hand over certificates and product warranties. Your 12-month workmanship guarantee starts here.
Recent work
Real jobs, our own photographs. Where we have the before shot as well, it's next to the after — because on a lot of this work the before is the reason someone picked up the phone.


Whole front elevation stripped and re-clad, roof works and new windows throughout. Scaffold up in the summer, finished and cleared by the autumn.
Large job
Bar rebuilt and refinished with a solid oak top, panelled walls and a printed front, worked around the pub's opening hours.
Large job
Full kitchen refit with the old chimney breast bricked up and the brickwork left exposed.
Large job

Rotten timber frames and failing brickwork taken out, wall rebuilt, new windows fitted and the whole run of guttering and fascia replaced.
Large job

Plastic fascia and soffit had been run out over the top of the windows after the brickwork above them was taken away — nothing to fix the window heads to, no insulation, and a draught coming straight through the trim in two bedrooms. Putting that back as it should be means scaffold, stripping the roof, new lintels and brickwork, so we agreed a warm, sealed fix from inside: 100mm insulation over the window, new timber to fix to, 9mm plasterboard, taped and jointed.
Small job

Perished felt, slipped slates and rotten timber at the verge. Stripped back, made good, new fascia, hopper and downpipe.
Small job

Holes right through the old corrugated sheeting. Before anything came off we had the sheets checked and confirmed as not asbestos — then stripped the roof, put additional purlins in to carry the new sheeting, re-sheeted, and closed the corrugations at the eaves with foam fillers. With the roof off, the cladding at the back was clearly past it, so that was replaced as well.
Medium job
Small bathroom stripped and refitted — shower enclosure, tiling, flooring and towel rail.
Medium job
Ground dug out, base laid and Indian sandstone set with a curved edge to follow the lawn.
Medium job

Rooms taken back to bare subfloor, made level, and new flooring laid through.
Medium job
The collage front being applied by hand, panel by panel.
Large jobChecking us out
The best way to judge a builder isn't a quote they've typed onto their own website. It's a finished job, and the person who paid for it.
Ask us and we will give you:
Get in touch
Ring for a straight answer today, or send your name and a couple of lines and we will come back to you — usually the same day, always within one working day.