Builder Costs in Hertford
East of England | Modelled planning ranges | Base prices dated May 2026 | Includes labour and materials
Cost Calculator
Estimated cost in Hertford
£15,960 - £43,320
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Hertford
Single Storey Extension
£15,960 - £43,320Labour
£9,120 - £22,800
Materials
£6,840 - £20,520
Typical duration: 6-12 weeks
Garage Conversion
£7,410 - £17,100Labour
£4,560 - £10,260
Materials
£2,850 - £6,840
Typical duration: 2-4 weeks
Internal Wall Removal
£798 - £2,622Labour
£570 - £1,710
Materials
£228 - £912
Typical duration: 1-3 days
Patio Construction
£1,482 - £5,130Labour
£912 - £2,850
Materials
£570 - £2,280
Typical duration: 2-5 days
How Hertford Compares
More expensive
Our model for Hertford is 14% above the base estimate. This is a location assumption, not a measured local quote average.
Illustrative Seasonality for Builder Work
Our seasonal model peaks in Jul and is lowest in Jan. This is not live demand data or a forecast of prices or availability.
What Affects the Price
Single Storey Extension
- Extension size (square metres)
- Foundation type required by ground conditions
- Roof design (flat, pitched, or lean-to)
- Level of internal finish and specification
- Planning permission or permitted development status
Garage Conversion
- Garage size and structural condition
- Level of insulation and damp proofing needed
- Whether plumbing or electrics are required
- Quality of internal finish
Internal Wall Removal
- Whether the wall is load-bearing
- Steel beam size and specification
- Services (pipes, wires) running through the wall
- Making good to floor, ceiling, and adjacent walls
Patio Construction
- Patio area (square metres)
- Material choice (concrete slabs, natural stone, porcelain)
- Ground preparation and levelling
- Drainage and edging requirements
Builder Profiles Near Hertford
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Frequently Asked Questions
How much does a builder cost in Hertford?
Builder prices in Hertford typically range from £798 for internal wall removal to £43,320 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Hertford?
Single Storey Extension in Hertford costs between £15,960 and £43,320 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Hertford?
Demand for builder work in Hertford is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Hertford above or below the national average?
Builder prices in Hertford are around 14% above the national average, reflecting higher local labour rates and cost of living.
Builder prices in nearby towns
Other trade prices in Hertford
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