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 Falmouth? An independent guide to septic tank emptying in Falmouth and across TR11: 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.
Falmouth (TR11) and Penryn sit at the head of one of the world's deepest natural harbours, with rural creeks and Roseland villages stretching out behind. In Mawnan Smith, Constantine, Mylor, Mabe Burnthouse and the Helford River villages, off-mains drainage is standard rather than exceptional.
Coastal access can be tricky — many of the prettiest cottages have driveways that predate the existence of tankers — so ask a local firm about the right vehicle and approach for a tight property. Helford-side jobs in particular need a bit of forward planning.
Falmouth and Penryn are mostly on mains, so the septic work concentrates in the surrounding villages — Mabe, Constantine, Budock Water, Mawnan Smith and out toward the Helford. That's a mix of farms, converted barns and higher-value coastal properties, with tanks of correspondingly varied age and type.
The university presence means a number of off-mains properties around Penryn and Budock run at higher occupancy than their tanks were designed for. Landlords letting to multiple tenants should expect a shorter emptying interval than a family home of the same size — it's the number of people, not the number of bedrooms, that fills a tank.
The lanes toward Constantine, Mawnan Smith and the Helford passage narrow considerably and several properties sit down steep private drives. Tanker access is usually workable but rarely straightforward, so it's worth flagging gradient and turning space when you enquire.
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 Falmouth 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 Falmouth? 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 Falmouth and the surrounding area.
Septic tank emptying in Falmouth 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 Falmouth 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 Falmouth 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 Falmouth and the surrounding villages and hamlets across TR11, including Penryn, Mawnan Smith, Constantine, Mylor, Mabe Burnthouse, Budock Water and Helford. 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.
Yes, with a bit of planning. Helford-side and Mylor creek properties often have steep, narrow approaches that predate tankers entirely. Firms that know the area know which lanes take which vehicles and will plan hose runs in advance — creek jobs just need a day or two more notice than town jobs.
More often than a family home of the same size. Tank loading tracks the number of people, not the number of bedrooms, so a five-tenant house fills considerably faster than a couple with two children. Start with a shorter interval and adjust once you've seen how it actually behaves.
Generally yes — Constantine, Mawnan Smith, Port Navas and the lanes down toward the Helford passage are all near Falmouth, but check when you ring. Those approaches are steep and narrow, so mention gradient and turning space when you enquire.