Builder Costs in Henley-on-Thames
South East | Modelled planning ranges | Base prices dated May 2026 | Includes labour and materials
Cost Calculator
Estimated cost in Henley-on-Thames
£17,920 - £48,640
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Henley-on-Thames
Single Storey Extension
£17,920 - £48,640Labour
£10,240 - £25,600
Materials
£7,680 - £23,040
Typical duration: 6-12 weeks
Garage Conversion
£8,320 - £19,200Labour
£5,120 - £11,520
Materials
£3,200 - £7,680
Typical duration: 2-4 weeks
Internal Wall Removal
£896 - £2,944Labour
£640 - £1,920
Materials
£256 - £1,024
Typical duration: 1-3 days
Patio Construction
£1,664 - £5,760Labour
£1,024 - £3,200
Materials
£640 - £2,560
Typical duration: 2-5 days
How Henley-on-Thames Compares
More expensive
Our model for Henley-on-Thames is 28% 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
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Frequently Asked Questions
How much does a builder cost in Henley-on-Thames?
Builder prices in Henley-on-Thames typically range from £896 for internal wall removal to £48,640 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Henley-on-Thames?
Single Storey Extension in Henley-on-Thames costs between £17,920 and £48,640 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Henley-on-Thames?
Demand for builder work in Henley-on-Thames is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Henley-on-Thames above or below the national average?
Builder prices in Henley-on-Thames are around 28% above the national average, reflecting higher local labour rates and cost of living.
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