The Quiet Infrastructure: Auditing Village Services Before You Exchange

There is a moment, usually about a week after your offer is accepted, when the romance of a village house meets the reality of a clipboard. The beams are still lovely. The garden still does that thing in the evening light. But somewhere under the lawn is a tank, and somewhere in a filing cabinet is a piece of paper that decides whether that tank is a modest annual expense or a five-figure problem with a smell attached.

This is the unglamorous part of buying character in the countryside. It is also the part that most often turns a dream into a very expensive lesson. So before you fall any further for the Aga, run a services audit.

Start with the paperwork, not the field

Your conveyancer will send the Property Information Form, and the drainage and water questions are where the truth tends to leak out. Ask directly: is the property connected to mains drainage? If not, what exactly is there — a septic tank, a package treatment plant, a cesspit, or something nobody has looked at since 1998? Where does it discharge? Who empties it, how often, and what does that cost?

A standard drainage and water search covers the public sewer network. It will not tell you much about a private system in a paddock. So request copies of any Environment Agency permits or registrations, the last emptying receipt, and any maintenance records. If the seller cannot produce them, that is not necessarily a red flag, but it is a reason to commission your own inspection rather than trust the particulars.

The General Binding Rules for small sewage discharges still apply in 2026. If a septic tank discharges to a surface water ditch or stream, it should have been upgraded or replaced. A treatment plant discharging to a watercourse needs the right permit and regular servicing. Ask what is registered, and ask to see it in writing.

The tank in the garden

A septic tank is not a sewage works. It separates solids and lets liquid drain away, usually into a drainage field — the underground network of pipes that slowly soaks into the soil. That field needs the right soil, the right distance from watercourses, and the right amount of space. It also needs to not be under the new patio.

Walk the garden with the seller or agent and ask where the tank and drainage field are. Look for the signs: a patch of grass that stays unnaturally green in August, a soft spot after rain, a faint whiff on a still day. None of these prove a problem, but they justify a proper look.

A CCTV drain survey will cost you roughly £250–£500 in 2026 and will tell you whether the pipework is sound. A percolation test, if the drainage field is being replaced or you need to prove the ground is suitable, is more like £500–£1,000. Neither is glamorous. Both are cheaper than discovering the problem after completion.

Water: private, shared, or a surprise

Mains water is the easy version. A private supply — a borehole, spring or well — is where village charm meets laboratory results. If the property has one, ask for the local authority risk assessment under the Private Water Supplies Regulations 2016 and the most recent sampling results. You want to know about bacteria, nitrates, lead, arsenic and anything else the tests flag.

If the supply is shared with neighbours, the questions multiply. Who owns the borehole? Who maintains the pump and treatment? Is there a written agreement, and does it set out how costs are split? What happens if one household uses far more water than another? A shared supply without paperwork is not automatically a disaster, but it is a relationship you are buying into.

Ask about flow and pressure, too. A beautiful old farmhouse with a trickling gravity feed can be charming until two showers are running and the washing machine is on.

Pipes under other people's land

Services do not always follow boundaries. A water pipe may cross a neighbour's field. A drainage pipe may run under a shared drive. A pump may sit in your outbuilding and serve three other houses. These are easements and wayleaves, and they need to be on the title or in a deed.

Ask your conveyancer to confirm: does any service cross third-party land, and do you have a right to access and maintain it? Does any neighbour's service cross your land, and have you got the corresponding obligation? Is there a maintenance agreement for shared systems, and is it enforceable?

This is also where insurance matters. Check whether your policy covers accidental damage to underground services and whether it extends to shared infrastructure. It is dull, but it is the sort of dull that saves you a five-figure argument.

What to budget in 2026

Nothing here is designed to scare you off. It is designed to put a number on the unromantic bits. As a rough guide for 2026:

• Emptying a septic tank: £180–£350, depending on access and size.
• CCTV drain survey: £250–£500.
• Percolation test and drainage field assessment: £500–£1,000.
• Upgrading a septic tank to a package treatment plant: £6,000–£15,000, depending on groundworks and discharge point.
• Private water risk assessment and sampling: £150–£400.
• Legal searches and additional enquiries: £100–£300 on top of the standard pack.

Add a contingency. Old houses always have a contingency. This is just the part of it that lives underground.

The questions to send before you exchange

If you take nothing else from this, take the list. Send it to the agent and your conveyancer, and ask for written answers:

• Where is the drainage system, and what type is it?
• Where does it discharge, and is that permitted?
• When was it last emptied and serviced, and by whom?
• Is the drainage field within the boundary, and is it protected from building work?
• Is the water supply mains or private? If private, is it shared, and is there a written agreement?
• Are there any easements, wayleaves or shared services affecting the property?
• Who maintains shared pumps, pipes or treatment plants, and how are costs divided?
• Can we see the last two years of service and emptying records?

None of this replaces a good survey or a good solicitor. It simply makes sure the conversation happens before you are emotionally and legally committed.

Village charm is real. So is the quiet infrastructure that keeps it working. Audit the latter, and you can enjoy the former without wondering what that smell is.