Pre-application enquiries to statutory undertakers
Capacity enquiries and point of connection quotations drive a development programme more than the planning determination period does. How to run them and what to submit.
Pre-application engagement with a statutory undertaker is a programme exercise, not a planning one. The planning authority can grant permission on a site with no electrical capacity and no sewer connection, and it does so regularly. What stops a scheme is a point of connection quotation that arrives eleven months after you needed it, or a water main under the access road that has to be diverted before any groundworks start. Start the enquiries at the same time as the pre-application request to the council, not after permission.
The undertakers that matter on most residential and commercial sites are the sewerage and water undertaker, the electricity distribution network operator, the gas transporter, the telecoms operators with apparatus in the footway and, where the access touches their network, the local highway authority or National Highways.
What an early enquiry is really buying
Three things: a capacity answer, a cost and a date. The date is the one that reshapes a programme.
Statutory undertakers work to their own published service standards rather than to the determination period for your application. A sewer capacity assessment is quick. A formal connection offer from a distribution network operator takes longer, and a diversion of live apparatus in third-party land takes longer again, because it needs design, easements, outages and sometimes a street works permit. None of that compresses because a planning committee date has been fixed.
An early enquiry also tells you whether the scheme as drawn is deliverable. A sewer running diagonally under the proposed terrace, with a 3 m easement either side, can remove four plots from a layout. Better to know at concept stage.
Capacity enquiries to the water and sewerage undertaker
Every sewerage undertaker in England runs a developer services function that answers pre-development enquiries on foul and surface water capacity. Ask for the public sewer records, the capacity position at the proposed point of connection, and any conditions the undertaker would expect to see on a planning permission.
The statutory framework sits in the Water Industry Act 1991. Section 106 gives an owner or occupier the right to connect drains and private sewers to a public sewer, subject to notice and to the undertaker's grounds for refusal. Section 98 allows a developer to requisition a new public sewer. Sections 41 and 42 do the same for a water main and a service pipe. Those rights are real, but they come with cost apportionment and with timescales that have to be programmed.
Two points catch people out. First, the right to connect under section 106 of the 1991 Act has nothing to do with a planning obligation under section 106 of the Town and Country Planning Act 1990, and conflating them in a report makes the author look careless. Second, a connection right does not guarantee treatment capacity downstream, and an undertaker's response on headroom at the receiving works is what a planning officer will want to see in a Foul Sewage Assessment.
Where the scheme relies on new or upsized infrastructure, ask whether the works are in the undertaker's current five-year investment programme. If they are not, the developer is funding them, and the phasing of the scheme has to follow the delivery date.
Point of connection and the electricity offer
The sequence for electricity is a budget estimate, then a formal application, then a connection offer.
A budget estimate gives an indicative point of connection, a reinforcement requirement and a cost, usually within a few weeks, and it is deliberately caveated. The formal offer is the document a funder will want, and it fixes the point of connection, the capacity, the works and the payment profile. Where reinforcement of the upstream network is needed, the cost can move by an order of magnitude between estimate and offer, which is why the estimate should be obtained before land value is agreed rather than after.
The connections market is contestable. An independent connection provider can build the works and an independent distribution network operator can own and operate them, which sometimes shortens the programme and sometimes complicates the adoption position. Either way the load assumptions should be set out properly: heat pumps, electric vehicle charging and commercial kitchens all push the maximum demand figure well above what an older scheme of the same unit count would have asked for.
Gas, telecoms and the records you need
Gas is often the shortest enquiry on a new scheme and the longest where apparatus has to be diverted, because a medium pressure main requires excavation, pressure management and a planned outage.
Telecoms operators hold rights under the Electronic Communications Code, and their apparatus in the footway is frequently the thing that delays a new footway crossing. Ask for records early, and ask specifically about chambers and ducts rather than cables alone.
Underground asset records are not a substitute for a survey. The practical standard for locating buried services on site is a utility survey to the relevant specification, read alongside the Health and Safety Executive guidance on avoiding danger from underground services. Records are indicative, depths are frequently wrong, and an unrecorded high voltage cable found during groundworks is both a safety incident and a programme event. The overall position is normally written up in a Utilities Assessment submitted with the application.
Diversions and the lead times that drive a programme
A diversion is the single most common reason a consented scheme does not start on time.
- Obtain records for every undertaker with apparatus on or adjoining the site, including any private apparatus serving third parties.
- Commission a utility survey to confirm position and depth where the layout depends on it.
- Ask each undertaker for a diversion feasibility response, with an indicative cost and programme.
- Check whether the diversion route crosses land you do not control, because that means an easement and a negotiation as well as a design.
- Confirm who carries the cost. Where apparatus sits in the public highway, statutory provisions and the undertakers' own terms govern the apportionment, and the answer differs between water, electricity and telecoms.
- Build the confirmed programme into the construction phasing before fixing a start date with a funder.
Where the diversion needs land in third-party ownership, the ownership position has to be stated correctly on the application forms as well. Our note on ownership certificates A to D covers which certificate applies and what notice has to be served.
An illustrative example
This example is illustrative. A 60-dwelling site has a 150 mm foul sewer along the southern boundary and an 11 kV overhead line crossing the north-east corner. The budget estimate for undergrounding the line and providing a new substation is obtained at option stage. The distribution network operator confirms the substation position, which moves two plots. The sewerage undertaker confirms capacity at the existing manhole but asks for attenuation to limit the discharge rate, which the drainage strategy then has to deliver. Because both answers arrived before the layout was fixed, the application drawings showed the substation, the easement and the attenuation basin, and the consultee responses raised no new issues.
Evidence to put in front of the planning officer
An officer is not assessing whether the connection is affordable. They are assessing whether the development can be served and whether the drainage and utilities arrangements are acceptable in planning terms.
What helps: the undertaker's written capacity response quoted and appended, a foul and surface water drainage strategy consistent with it, a plan showing apparatus and easements, and a note of any diversion with its programme. A Water Supply Assessment is worth including where the scheme is large or the local network is constrained. Keeping track of what each consultee has actually said is its own discipline, and our guide to getting consultee responses and the officer's case file explains how to do it without guessing.
What does not help: an assertion that capacity is available with nothing behind it. That invites a holding objection and a condition requiring details to be agreed before work starts, which simply moves the risk to a point where you have less time.
Draft the utilities and drainage sections while the enquiries are outstanding, leave the figures flagged, and fill them in when the responses land. Enter your postcode on PlanScope to see which reports your site is likely to need.
This is general guidance, not legal advice; check the position with your local planning authority, the relevant undertaker or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
What is a statutory undertaker in planning terms?
The term is defined in section 262 of the Town and Country Planning Act 1990 and covers bodies authorised by statute to carry on undertakings such as water supply, sewerage, electricity distribution, gas transportation, railways and airports. In practice, for a development site it means the water and sewerage undertaker, the distribution network operator, the gas transporter and the telecoms operators with apparatus nearby.
Do I have a right to connect to the public sewer?
Section 106 of the Water Industry Act 1991 gives an owner or occupier the right to connect drains and private sewers to a public sewer, subject to notice and to limited grounds on which the undertaker may refuse. That right is separate from capacity in the downstream network and from the treatment works, which is why a written capacity response matters in a planning submission.
When should utility enquiries start?
At the same time as the pre-application request to the council, and ideally before the layout is fixed. Budget estimates for electrical connections and sewer capacity responses commonly change a layout by moving a substation, adding attenuation or imposing an easement. Starting after permission is granted is how consented schemes miss a funder's start date.
Who pays for diverting a water main or cable?
It depends on where the apparatus sits and which undertaker owns it. Statutory provisions and the undertakers' own terms govern the apportionment, and the position differs between water, electricity, gas and telecoms. Treat the cost as unknown until you have a written diversion response, and never assume the undertaker carries it.
Will the council refuse permission if there is no capacity?
Not usually on capacity alone, but an undertaker's holding objection commonly results in a condition requiring a drainage or utilities scheme to be agreed before work starts. That shifts the risk to the point when you want to start on site. Submitting the written capacity position with the application is the way to avoid it.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.