Builder Costs in Sevenoaks
South East | Prices updated for 2026 | All estimates include labour and materials
Cost Calculator
Estimated cost in Sevenoaks
£17,640 - £47,880
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Sevenoaks
Single Storey Extension
£17,640 - £47,880Labour
£10,080 - £25,200
Materials
£7,560 - £22,680
Typical duration: 6-12 weeks
Garage Conversion
£8,190 - £18,900Labour
£5,040 - £11,340
Materials
£3,150 - £7,560
Typical duration: 2-4 weeks
Internal Wall Removal
£882 - £2,898Labour
£630 - £1,890
Materials
£252 - £1,008
Typical duration: 1-3 days
Patio Construction
£1,638 - £5,670Labour
£1,008 - £3,150
Materials
£630 - £2,520
Typical duration: 2-5 days
How Sevenoaks Compares
More expensive
Trade prices in Sevenoaks are typically 26% above the national average. This reflects local labour rates and the cost of living in South East.
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
Builder Profiles Near Sevenoaks
Find trusted, reviewed builder professionals near you. Tradesfolk is completely free to use.
Frequently Asked Questions
How much does a builder cost in Sevenoaks?
Builder prices in Sevenoaks typically range from £882 for internal wall removal to £47,880 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Sevenoaks?
Single Storey Extension in Sevenoaks costs between £17,640 and £47,880 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Sevenoaks?
Demand for builder work in Sevenoaks is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Sevenoaks above or below the national average?
Builder prices in Sevenoaks are around 26% above the national average, reflecting higher local labour rates and cost of living.
Looking for a builder in Sevenoaks?
Browse verified builder profiles with reviews from local homeowners. 100% free.