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Septic Tank Prices United Kingdom
Prices include VAT at 20%. Note: Under the 2020 General Binding Rules, septic tanks discharging directly to surface water or ditches must be replaced with a compliant sewage treatment plant. Always check Environment Agency requirements before installation.
Septic Tank Prices by Service Type — United Kingdom
Prices include VAT at 20%. Note: Under the 2020 General Binding Rules, septic tanks discharging directly to surface water or ditches must be replaced with a compliant sewage treatment plant. Always check Environment Agency requirements before installation.
| Service | Unit | From | Average | Up to |
|---|---|---|---|---|
| 🚛Septic Tank / Cesspit Emptying Empty and dispose of septic tank or cesspit contents by a registered waste carrier, typically required every 12 months for septic tanks and more frequently for cesspits | /service | £150 | £250 | £400 |
| 🏗️Septic Tank Installation (New) New septic tank or sewage treatment plant installation including tank supply, excavation, drainage field, and Building Regulations approval under Part H | /job | £3,000 | £6,000 | £10,000 |
| 🔄Septic Tank Replacement Replace an existing septic tank with a new unit — note that under 2020 General Binding Rules, older tanks discharging to surface water must be replaced with compliant treatment plants | /job | £2,500 | £5,500 | £9,000 |
| 🏭Sewage Treatment Plant Install Install a packaged sewage treatment plant compliant with 2020 General Binding Rules, including unit supply, excavation, drainage field, and Building Regulations approval | /job | £4,000 | £8,500 | £14,000 |
| 📋Septic Tank Inspection & Report Professional inspection of septic system including structural condition, drainage field assessment, and written compliance report for property conveyance or mortgage purposes | /report | £200 | £380 | £600 |
| ⛏️Drainage Field (Soakaway) Install Install new drainage field or soakaway system including percolation testing, pipe installation, aggregate, and Building Regulations sign-off | /job | £2,000 | £4,500 | £8,000 |
| 🏗️Cesspit Installation Install a new cesspit (sealed holding tank with no discharge) where site conditions or regulations prevent a drainage field — requires regular emptying every 4–8 weeks | /job | £3,500 | £6,000 | £9,000 |
| 🛠️Septic Tank Repair Repair cracks, damaged covers, broken baffles, or inlet/outlet fittings on existing septic tanks or treatment plants | /job | £300 | £750 | £1,500 |
| ⚡Sewage Pump Replacement Supply and install a replacement sewage pump or air compressor for packaged treatment plants including commissioning and test | /job | £400 | £850 | £1,500 |
| 📅Annual Service Contract Annual service contract for packaged sewage treatment plants including electrical and mechanical inspection, servicing, and compliance check | /year | £150 | £280 | £450 |
| 🍽️Grease Trap Emptying Empty and clean grease trap or interceptor at commercial or residential properties including waste disposal and basic condition inspection | /service | £120 | £220 | £350 |
| 🔬Percolation / Site Test Conduct BS 6297 percolation tests to determine soil drainage capacity for planning and Building Regulations approval of drainage fields or soakaway systems | /test | £200 | £380 | £600 |
Septic Tank Prices by City
Click a city for detailed local pricing and tips
London
England · 9.0M
From £195
Manchester
England · 2.8M
From £160
Birmingham
England · 2.6M
From £152
Leeds
England · 800K
Pricing available
Liverpool
England · 900K
Pricing available
Bristol
England · 470K
From £165
Sheffield
England · 580K
Pricing available
Newcastle
England · 300K
Pricing available
Nottingham
England · 330K
Pricing available
Southampton
England · 260K
Pricing available
Brighton
England · 230K
Pricing available
Cambridge
England · 145K
Pricing available
Oxford
England · 155K
Pricing available
Reading
England · 175K
Pricing available
Plymouth
England · 265K
Pricing available
Edinburgh
Scotland · 530K
From £176
Glasgow
Scotland · 630K
Pricing available
Aberdeen
Scotland · 230K
Pricing available
Dundee
Scotland · 150K
Pricing available
Cardiff
Wales · 370K
Pricing available
Swansea
Wales · 245K
Pricing available
Belfast
Northern Ireland · 345K
Pricing available
Septic tank service prices in United Kingdom range from £120 for basic pump-outs to £14,000 for complex new installations or aerated treatment systems. Prices include VAT at 20%. Note: Under the 2020 General Binding Rules, septic tanks discharging directly to surface water or ditches must be replaced with a compliant sewage treatment plant. Always check Environment Agency requirements before installation.
The most common septic tank services in United Kingdom include tank pump-outs, new installations, tank replacement, septic to sewer conversion, system inspections and compliance reports, absorption trench repair, aerated treatment system installation, and effluent pump replacement.
Regular pump-outs every 3–5 years prevent costly system failures. Get 2–3 quotes for major work. Organise council approvals before engaging contractors to avoid delays. Schedule non-urgent work for autumn or winter when demand is lower. Prices include VAT at 20%. Note: Under the 2020 General Binding Rules, septic tanks discharging directly to surface water or ditches must be replaced with a compliant sewage treatment plant. Always check Environment Agency requirements before installation.
In United Kingdom, most septic tank modifications, repairs, and new installations require council or local authority permits. Routine pump-outs typically do not require approval. Requirements vary across United Kingdom by state, province, or region. Prices include VAT at 20%. Note: Under the 2020 General Binding Rules, septic tanks discharging directly to surface water or ditches must be replaced with a compliant sewage treatment plant. Always check Environment Agency requirements before installation.
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