Builder Costs in Harlow
East of England | Prices updated for 2026 | All estimates include labour and materials
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Estimated cost in Harlow
£15,680 - £42,560
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Harlow
Single Storey Extension
£15,680 - £42,560Labour
£8,960 - £22,400
Materials
£6,720 - £20,160
Typical duration: 6-12 weeks
Garage Conversion
£7,280 - £16,800Labour
£4,480 - £10,080
Materials
£2,800 - £6,720
Typical duration: 2-4 weeks
Internal Wall Removal
£784 - £2,576Labour
£560 - £1,680
Materials
£224 - £896
Typical duration: 1-3 days
Patio Construction
£1,456 - £5,040Labour
£896 - £2,800
Materials
£560 - £2,240
Typical duration: 2-5 days
How Harlow Compares
More expensive
Trade prices in Harlow are typically 12% above the national average. This reflects local labour rates and the cost of living in East of England.
Seasonal Demand for Builder Work
Peak demand is typically in Jul, with the quietest period around Jan. You may find lower prices and better availability during off-peak months.
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
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Frequently Asked Questions
How much does a builder cost in Harlow?
Builder prices in Harlow typically range from £784 for internal wall removal to £42,560 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Harlow?
Single Storey Extension in Harlow costs between £15,680 and £42,560 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Harlow?
Demand for builder work in Harlow is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Harlow above or below the national average?
Builder prices in Harlow are around 12% above the national average, reflecting higher local labour rates and cost of living.
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