For homeowners with a failing or non-compliant system, and for new builds on off-mains sites. Survey-led, compliance-backed, and matched with verified UK specialists.
All installs meet current UK regulations
Most homeowners come to us for one of six reasons. All six are handled end-to-end by our network.
Tank backing up, overflowing, sewage on the surface or a drainage field that's no longer soaking away. Often reveals decades of deferred maintenance.
Your solicitor or buyer's surveyor has flagged a non-compliant system. Sale is blocked until the issue is resolved — either by replacement or by a remediation plan.
Direct discharge to surface water (a ditch, stream or river) from a septic tank is illegal. Fines up to £100,000. Fix is usually a sewage treatment plant or a proper drainage field.
Off-mains site where you need a correctly sized compliant system from day one. Includes building regulations sign-off and Environment Agency paperwork where required.
New bedrooms, loft conversion, annexe or a larger family has pushed the existing tank beyond its design capacity. Symptoms usually appear within 6–18 months.
Concrete tanks from the 1970s/80s are often past their serviceable life. Signs: corroded baffles, cracked walls, root intrusion, crumbling access covers.
Every project follows the same survey-led sequence — no two sites are identical, so we confirm everything on site before quoting a fixed price.
A 5-minute qualifying call: property type, bedrooms/occupancy, access, current system and the reason for replacement.
A specialist visits the property. Reviews access, soil type, existing system condition, drainage-field area, watercourse proximity, permit requirements.
A BS 6297 soil porosity test determines drainage-field sizing. Skipped only where a sewage treatment plant discharges directly (and EA permit applies).
Fixed written quote — tank/plant type, groundworks, electrical, commissioning, waste disposal, building regs fees, handover documentation.
Where required: Environment Agency permit (sewage treatment plant with direct discharge), building regulations notification, neighbour/party-wall checks.
Groundworks, tank placement, pipework, drainage field, electrical connection, backfill, reinstatement. Typical domestic install: 3–5 working days on site.
Commissioning report, building regs sign-off (where applicable), operation & maintenance manual, warranty documentation and a maintenance schedule.
Your site and ground conditions dictate which system fits. Your surveyor will confirm which of these three is suitable.
Four factors account for most of the price difference between a straightforward £10k install and a complex £20k+ project. Understanding them upfront helps you spot unrealistic quotes.
Clay, rock or high water table dramatically increase groundworks. A straightforward percolating site can be half the cost of a clay-heavy one.
Tight driveways, gardens behind the house or long cable/pipe runs add days to the install. No excavator access = hand-dig = significant labour.
Treatment plants are ~£3–5k more than septic tanks. Reinforced tanks under driveways add £800–£1,500. Pumped systems need electrical work.
EA permits, building regs fees, tree protection, reinstating paving or tarmac, and disposing of the old tank all add to the headline figure.
Since 1 January 2020, UK homes with off-mains drainage must either: (a) discharge to a drainage field via a correctly sized septic tank, or (b) use a certified sewage treatment plant. Direct discharge to a watercourse from a septic tank is no longer permitted — and is an offence carrying fines up to £100,000.
Every replacement we match is designed to meet or exceed these requirements. Where a permit is required (sewage treatment plant to watercourse) the specialist handles the Environment Agency submission as part of the project.
Quick form — 4 steps. Matched with a verified UK specialist within 1 working day.
