D&A Brickwork & Building did a fantastic job of our ground floor… Read all reviews





Builders in Dunstable
Looking for builders in Dunstable? D & A Brickwork & Building is a family-run firm based in Bidwell, Dunstable, doing extensions, conversions, brickwork and hardscaping — with NVQ Level 2 tradespeople and over 26 years' experience.
We also work in Harpenden and the nearby villages. Our bricklayers · Dunstable projects.
What our Dunstable builders do
Four kinds of work, all carried out by our own team from the Bidwell base. Each page explains the work in detail.
House extensions
Single and double-storey, rear, side and wrap-around extensions, including kitchen and dining extensions, from foundations to finish.
Garage, loft and outbuilding conversions
Turning space you already own into rooms, insulated and built to Building Regulations.
Bricklaying and brick repair
Garden and structural walls, arches, chimneys, brick matching and repointing.
Patios, driveways and hardscaping
Patios, block paving and garden walls laid on a properly prepared base.
Tell us about your project
Answer 5 quick questions to request a tailored estimate.
- Free, no-obligation estimate
- 26+ years experience
- Fully insured
What kind of project?
About Us
We are a family-run building company working across Harpenden, Wheathampstead, Redbourn and the surrounding Hertfordshire villages, specialising in domestic:
- Extensions
- All related hard landscapes
- Garage conversions
- Structural RSJ works
Our contractors have over 26 years of experience and hold a NVQ LEVEL 2 in various trades.
After I finished school, I went on to Barnfield College to achieve an NVQ LEVEL 2 in brickwork, which was 26 years ago. I first worked for my family construction company doing extensions on people’s homes, and we were taught from the very beginning to always keep a clean and tidy site and working environment, which we still use in full force today.
We have experience in bricklaying, conversions, property extensions, hardscaping, refurbishments, and many other building works.



Builders in Harpenden, AL5
Harpenden and the villages around it are where we do most of our work — Batford, Southdown, Kinsbourne Green, Townsend, Rothamsted and the roads either side of the Common, plus Wheathampstead and Redbourn. It is a mix of Victorian and Edwardian villas, 1930s semis and large post-war detached houses, and each type wants a different approach to extending. We will tell you honestly which one yours is and what it can take.
Harpenden housing stock
Around Crabtree Lane, Cravells Road and Bloomfield Road you are mostly dealing with late-Victorian and Edwardian brick, solid-wall construction, generous ceiling heights and long rear gardens — ideal for full-width rear extensions with a glazed link. The Uplands and Southdown bring 1930s semis with side access wide enough for a two-storey side extension. Towards Kinsbourne Green and Rothamsted the plots are larger detached houses where wrap-around extensions and garden rooms make more sense than loft work.
Conservation areas & the Common
Properties fronting Harpenden Common, the High Street and parts of Batford sit inside conservation areas, where permitted development is trimmed back: side elevations, roof alterations and front-facing changes usually need consent, and brick, mortar colour and window detail get scrutinised. We match existing brick and use lime mortar where the wall calls for it rather than defaulting to modern cement.
Planning & building control
Harpenden falls under St Albans City & District Council for planning and building control, with Hertfordshire highways involved on anything touching a footway crossing. Plenty of rear extensions and loft conversions go through on permitted development, but Article 4 and conservation constraints apply street by street. We check your specific address before you spend anything on drawings.
What we build in Harpenden
Single and double-storey extensions, loft and garage conversions, period brickwork and repointing, patios, driveways and garden walls, plus structural RSJ openings.
Full Harpenden pageVillages around Harpenden we serve
Each has its own local page with postcodes, housing stock and planning notes.
- Builders in HarpendenAL5 · Hertfordshire
- Builders in WheathampsteadAL4 · Hertfordshire
- Builders in RedbournAL3 · Hertfordshire
We also still cover our original Bedfordshire patch — see all areas covered.
How a project with us runs
- 01
Survey & site visit
We visit, measure up and talk through what you want.
- 02
Estimate
We assess the property and the work needed before the project begins.
- 03
Build stages
Foundations and groundworks first, then structure, then finish.
- 04
Handover & aftercare
A clean, tidy site at handover and we remain on the end of the phone afterwards.
Want the full detail? Read our six-step process or request your free estimate.
Our Services

Bricklaying
Our skilled bricklayers deliver exceptional craftsmanship, ensuring durable and aesthetically pleasing results for your project.
Learn more
Conversions
Transform your space with our expert conversion services, tailored to meet your unique needs and style preferences.
Learn more
Extensions
Maximise your home’s potential with our bespoke extension solutions, designed to enhance both space and functionality.
Learn more
Hardscaping
Elevate your outdoor areas with our premium hardscaping services, creating stunning and practical spaces to enjoy year-round.
Learn morePlan Your Project
Free Quote
Answer a few quick questions to request a tailored estimate.
Cost Calculator
Get a quick ballpark price for your extension, conversion or driveway.
Our Process
Six clear steps from first enquiry through to handover and aftercare.
FAQs
Common questions about pricing, planning and project stages.
Areas Covered
Local builders serving Harpenden, Wheathampstead, Redbourn and the nearby Hertfordshire villages.
Customer reviews
Reviews from Google, Checkatrade and Revu
Fortunately for me, D&A builders were recommended to help with a small… Read all reviews
They were very professional and polite did an amazing job and very… Read all reviews

Ready to start your project?
Request a free, no-obligation quote for your project.









