Builders in Hertfordshire
29 practices covering Hertfordshire. Listings are business information researched by Renovome; contact details and matching happen inside Workspace.
A•••• P•••••••
Hertfordshire plumbing company providing residential plumbing and heating repairs and installations, with no job too small.
H••• E••••••
Domestic trade and property maintenance business serving Hertford, Ware, Hoddesdon, Broxbourne and surrounding areas.
H•••• P••••••• S•••••••• L••
Domestic trade and property maintenance business serving Hertfordshire and surrounding areas.
J• D•••••••• B••••
Painter and decorator covering Buckinghamshire and Hertfordshire and explicitly accepting jobs of all sizes.
P•••••• E••••••••
Hitchin-based electrical business undertaking domestic electrical work and explicitly welcoming small jobs.
A••••• H••• D•••••••• L••
UK residential builder or main contractor undertaking home extensions, renovations, refurbishments, conversions, new builds or related works in Hertfordshire.
B••••• E••••
BALI Accredited landscape contractor based in Hertfordshire.
B••••• P••••••• R••••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
C••• C••••••••
UK building contractor offering residential extensions, renovations, refurbishments or related home-improvement construction services.
D•• B••••••• L••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
D••••• B•••••• G••••• C••••••••
BALI Accredited landscape contractor based in Hertfordshire.
D•••••• B••••••• L••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
G• L•••••• S••••••• L••
BALI Accredited landscape contractor based in Hertfordshire.
G••• T••••• &• C••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Bedfordshire / Hertfordshire.
G•••••••• L••
BALI Accredited landscape contractor based in Hertfordshire.
H••••••• C•••••••• L••
UK building contractor offering residential extensions, renovations, refurbishments or related home-improvement construction services.
J• C••••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Bedfordshire / Hertfordshire.
L••• B•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Bedfordshire / Buckinghamshire / Hertfordshire.
O••• C•• L••••••
UK residential builder or main contractor undertaking home extensions, renovations, refurbishments, conversions, new builds or related works in Hertfordshire.
P•••••••• F•••••••• L••
BALI Accredited landscape contractor based in Hertfordshire.
R•••••• L•••••••• L••
BALI Accredited landscape contractor based in Hertfordshire.
S••• D••••• &• B••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
S•••• R••• H••• I••••••••
UK building contractor offering residential extensions, renovations, refurbishments or related home-improvement construction services.
S•••••••• o• H••••••• L••
BALI Accredited landscape contractor based in Hertfordshire.
T• W•••••• B•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
T•• L•••••••• a•• G•••••
BALI Accredited landscape contractor based in Hertfordshire.
T•• O•••••• G••••• C••
BALI-listed landscape contractor based in Hertfordshire.
T•• W•••• N•••••••• L••
BALI-listed landscape contractor based in Hertfordshire.
Y••••• R••• P••••••• S•••••••
UK residential building contractor delivering extensions, renovations, refurbishments or related home-improvement work in Hertfordshire.
How to choose a builder in Hertfordshire
You appoint a builder once the scope is defined. If you invite builders before the drawings and specification are settled, every quote prices a different job and you cannot compare them.
- Give every builder the same drawings, specification and programme, then compare line by line.
- Check the company at Companies House, and ask how long the team has worked together.
- Visit a current site, not just a finished photo.
- Ask for public liability insurance and, where relevant, a warranty or guarantee.
- Agree a payment schedule tied to stages completed, never a large payment up front.
What builders in Hertfordshire typically work on
- Single and two-storey extensions
- Loft conversions and garage conversions
- Kitchen and bathroom refits
- Structural openings and knock-throughs
- Whole-house refurbishments
Typical 2026 fees for builders
| Item | Typical 2026 cost |
|---|---|
| Extension shell, per square metre | £2,300 - £3,400 |
| Single-storey rear extension, 20 sq m | £52,000 - £86,000 |
| Loft conversion, rear dormer | £48,000 - £78,000 |
| Structural opening with flush beam | £4,500 - £12,000 |
| Day rate, two-person team | £380 - £620 |
Indicative 2026 UK ranges, not quotations. London and the South East usually sit at the top of each range. Last reviewed: September 2026.
Common questions
- How many builders should I ask to quote?
- Three is enough, provided all three price the same written scope. More quotes on a vague brief produce a wider spread, not better information.
- Why do quotes for the same job differ so much?
- Usually because they include different work. Compare the inclusions, exclusions and provisional sums before you compare the totals.
Read next
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