Septic Tank Emptying
Regular emptying of domestic and commercial septic tanks across Cornwall. Whoever does it must be a registered waste carrier. Most standard tanks take under an hour.
From £150Full tank in Penzance? An independent guide to septic tank emptying in Penzance and across TR18, TR19 and TR20: what it involves, what it typically costs, and how to check a firm is a registered waste carrier. We’re not a septic tank company.
Penzance (TR18–TR20) and the far west of Cornwall has more off-mains properties per square mile than almost anywhere else in the county. From Marazion and Newlyn out to St Buryan, Sennen, Land's End and St Just, septic tanks and cesspits are the norm rather than the exception.
The narrow lanes and long farm tracks of the Penwith peninsula catch tankers out — including the bits where the postcode lookup says the tanker will fit and it really won't. Before you book, tell the firm exactly where the tank is and ask whether their vehicle can actually reach it, which sounds obvious but isn't always the case out here.
The far west has the narrowest access in Cornwall. Properties around Newlyn, Mousehole, Paul, Sancreed and the Penwith moors sit on lanes that a full-size tanker genuinely cannot use. This is not a reason a job can't be done — it's a reason the vehicle needs matching to the address before anyone sets off.
Operators who work Penwith properly carry long-reach hose and, in some cases, run smaller vehicles specifically for these lanes. When you enquire, describing the approach — passing places, gateway width, how far the tank is from where a vehicle can stop — saves everybody a wasted visit.
Penzance is a long way from most of Cornwall's tipping points, and that shows up in scheduling rather than price. Same-day work is less commonly available in TR18–TR20 than it is around Truro, so if your tank is getting close, book ahead rather than waiting.
We’re an independent guide, not a septic tank company. These are the honest options; pick whichever suits you.
Anyone who takes septic tank waste away must be a registered waste carrier. Whichever local firm you find, look it up on the Environment Agency’s public register before you book.
Ask for the firm’s waste carrier registration and check it, get a written price that says what’s included (disposal, hose length, access), and ask for a waste transfer note once the job is done.
Leave your details and we’ll try to introduce you to one local septic tank firm covering your postcode. We’re still looking for local firms to work with, so we may not have one for your area yet. We’ll tell you who before sharing anything, and septic tank firms may pay us for introductions.
Whatever’s going on below ground at your Penzance property, here’s what each job involves and what it typically costs.
Regular emptying of domestic and commercial septic tanks across Cornwall. Whoever does it must be a registered waste carrier. Most standard tanks take under an hour.
From £150Full cesspit pump-outs for sealed systems. Cesspits need emptying far more often than septic tanks, so the running cost adds up.
From £120New septic tank or treatment plant installation, fully compliant with the General Binding Rules 2020. Survey, install, commission: what a full job includes.
From £3,000Tank backing up, soakaway saturated, weird smells in the garden? Diagnosis via CCTV, then repair or replace: how to decide.
From £150 (survey)Blocked or slow-running drains cleared fast using high-pressure jetting. From kitchen sinks to main sewer lines.
From £80Camera inspections to diagnose blockages, root ingress, collapsed pipes, and drainage issues before they become expensive problems. A written report should be part of it.
From £150Prices depend on tank size, access, and your exact location. These are guides, not quotes: always get a written price before work starts.
Standard domestic tank (up to 2,700L). Price varies by access and distance.
Sealed cesspit pump-out. Larger cesspits (10,000L+) quoted individually.
High-pressure jetting. Most domestic blockages cleared in under an hour.
Out-of-hours and weekend work, where a firm has capacity. Ask for the price before they set off.
Not in Penzance? Pick your nearest town guide below.
Old system failing, or building off the mains? Our installation guide covers septic tanks and treatment plants — surveys, groundwork, General Binding Rules compliance and typical costs.
Septic tank installation in Cornwall →Peak-season occupancy fills tanks fast — and a backed-up tank mid-stay means refunds. Our holiday-let guide covers scheduling emptying around changeover days and planning for peak season.
Septic tank care for holiday lets →Everything you need to know about septic tank emptying in Penzance and the surrounding area.
Septic tank emptying in Penzance typically costs between £150 and £300, depending on tank size, access, and how far the specialist needs to travel. Cesspits usually cost more due to larger volumes. Emergency or out-of-hours callouts may incur an additional charge — always get a written quote up front.
Most domestic septic tanks in the Penzance area should be emptied every 6 to 12 months. A family of four with a 2,700-litre tank typically needs annual emptying. Smaller tanks, larger households, or heavy holiday-let use can mean more frequent service. Slow drains or odours usually mean it's overdue.
Some local firms can empty a tank the same day when their schedule allows, but it isn’t guaranteed, especially in peak season. Ring two or three firms that work around Penzance and say how urgent it is; calling early in the day helps.
You don't need a permit to have your tank emptied, but the waste must be disposed of by a licensed waste carrier registered with the Environment Agency. You can check any firm on the Environment Agency’s public register of waste carriers. Under the General Binding Rules (2020), your tank must also discharge to a drainage field — not directly to a watercourse.
This guide covers Penzance and the surrounding villages and hamlets across TR18, TR19 and TR20, including Marazion, Newlyn, St Buryan, Sennen, Land's End, St Just, Mousehole and Pendeen. We’re an independent guide, so we don’t send anyone out ourselves; look for a firm that works your patch and check it on the waste carrier register, or ask us for an introduction.
All waste is transported by licensed tanker to an approved treatment facility or sewage works. Whoever empties your tank must be a registered waste carrier with the Environment Agency, and you can ask for a waste transfer note as proof of legal disposal.
This is the number-one question in the far west, and the honest answer is: it depends on the lane, so check before anyone is booked. Some addresses need the small-tanker option, some need a long hose run from the nearest passing point. Describe the access when you ring, so nobody arrives, shrugs, and drives off.
Then the answer is a longer hose run or a smaller vehicle, not a shrug and a wasted callout. Operators who work Penwith properly plan for this. The important thing is describing the access honestly when you enquire — gateway width, passing places, and how far the tank sits from where a vehicle can stop.
Generally yes, along with Sancreed, Paul and the moorland properties inland, but ask when you ring. It's the scheduling that needs more notice than it would nearer Truro, simply because of the distances involved.