Builder Costs in Southend-on-Sea
East of England | Modelled planning ranges | Base prices dated May 2026 | Includes labour and materials
Cost Calculator
Estimated cost in Southend-on-Sea
£15,400 - £41,800
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Southend-on-Sea
Single Storey Extension
£15,400 - £41,800Labour
£8,800 - £22,000
Materials
£6,600 - £19,800
Typical duration: 6-12 weeks
Garage Conversion
£7,150 - £16,500Labour
£4,400 - £9,900
Materials
£2,750 - £6,600
Typical duration: 2-4 weeks
Internal Wall Removal
£770 - £2,530Labour
£550 - £1,650
Materials
£220 - £880
Typical duration: 1-3 days
Patio Construction
£1,430 - £4,950Labour
£880 - £2,750
Materials
£550 - £2,200
Typical duration: 2-5 days
How Southend-on-Sea Compares
More expensive
Our model for Southend-on-Sea is 10% 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 Southend-on-Sea?
Builder prices in Southend-on-Sea typically range from £770 for internal wall removal to £41,800 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Southend-on-Sea?
Single Storey Extension in Southend-on-Sea costs between £15,400 and £41,800 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Southend-on-Sea?
Demand for builder work in Southend-on-Sea is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Southend-on-Sea above or below the national average?
Builder prices in Southend-on-Sea are around 10% above the national average, reflecting higher local labour rates and cost of living.
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