Self-lay is where a developer or property owner uses an accredited contractor, called a self-lay provider (SLP), to install new water mains and connections instead of waiting for the water company. The SLP lays, tests and commissions the pipes to the water company’s standards, and the water company then adopts them. It’s usually faster, more flexible and often cheaper, with one contractor handling everything from approvals to adoption.
McFadden Utilities is a WIRS-accredited self-lay provider, approved by Lloyd’s Register (LRQA) and recognised by all water companies in England and Wales. We deliver self-lay water services end to end across Hertfordshire, London, Surrey, Essex, Cambridgeshire and Berkshire, from single houses and conversions to multi-phase developments.
Typical clients include property developers, housebuilders, commercial site owners and civils contractors on new-build schemes. We also take on smaller jobs: a single new house, a conversion into flats or an annexe. If you’ve already had a quote from the water company, send it over with your enquiry and we’ll price the self-lay route against it.
It's a family business, and that's felt with the people who actually do the work, not a call centre.
Paul McFadden, Director
The full lifecycle covers mains extension (offsite), onsite distribution mains, service connections, chlorination, pressure testing, and handover to the water company for adoption. Single plot or multi-phase estate, it’s one contractor from excavation to flowing water.
Every job meets the standards set by the water company in that area. Teams work from the Hertfordshire hub, covering London and the wider South East as standard, with larger schemes taking us further afield.
The self-lay process is built to fit around the project programme, not the other way around.
A site visit, a review of the project programme, then water company applications handled on the client's behalf. Where it helps, McFadden reviews the mains design and feeds back practical experience to keep things efficient.
Water company approvals, permits, and traffic management. Programme agreed, programme stuck to.
Teams install the mains and services, then chlorinate, flush, and pressure test to the water company standard.
The water company inspects and adopts the infrastructure. Flowing water, paperwork done.
We deliver self-lay water services from our Hertfordshire depot, covering six counties as standard. For larger developer projects, we’re happy to travel further. Our teams know the local water companies, the approval processes, and the reinstatement standards in every area we cover.
The questions we hear most about self-lay water services.
A self-lay provider (SLP) is an approved contractor who installs, tests, and commissions new water mains and services on behalf of a developer, instead of the water company. Once the work meets the required standards, the water company adopts the infrastructure. McFadden Utilities is accredited under the WIRS scheme, recognised by all water companies in England and Wales.
Cost, speed, and flexibility. Self-lay is typically cheaper than going through the water company. We schedule around your build programme rather than waiting for the water company. And you deal with one contractor who manages everything from approvals through to handover.
WIRS is the Water Industry Registration Scheme, administered by Lloyd’s Register (LRQA). It’s the national accreditation for self-lay providers. Being WIRS accredited means our work, methods, and quality management have been independently assessed and approved.
Yes. Onsite covers the infrastructure within your development boundary. Offsite covers the mains extension outside the site to connect to the existing water network. We handle both, including all highway works and reinstatement.
Based in Hertfordshire, we cover developments across London, Surrey, Essex, Cambridgeshire, and Berkshire as standard. For larger projects, we’re happy to travel further.
Depends on scale and the water company approval timescales. A single-plot connection might take a few weeks, although if the road has to be closed, the traffic order alone can take around three months. A multi-phase estate could run several months, phased around your build programme.
Usually, yes. Self-lay is typically cheaper than letting the water company do the work, though the exact saving depends on the scale of the scheme and the water company’s own rates. Each job is priced transparently, so the quote can be compared against the water company’s direct quote side by side.
With the water company direct, they design and install the infrastructure on their own schedule, with their own subcontractors. With a self-lay provider, an accredited contractor does the same work to the same standards, scheduled around the project programme. The water company still inspects and adopts the pipes at the end, so the finished infrastructure is identical. What changes is the cost, the timeline, and who holds the contract.
We work regularly across the Thames Water and Affinity Water areas, which cover most of our six-county service area. As a WIRS-accredited SLP, we can register for and operate in any water company’s area in England and Wales.
Whether it's a single plot or a large-scale development, we'd welcome the conversation. As a WIRS-accredited self-lay provider, family-run since 1980, we give you one contractor and one point of contact from first call to flowing water.
Phone: 01707 648 420
Email: [email protected]