Road and Sewer Bonds: complete guide for UK developers and contractors
Most developers encounter road and sewer bonds as an administrative requirement — something the local authority or water board asks for before work can start. They are not simply administrative.
What is a Road and Sewer Bond?
A road and sewer bond is a surety instrument — not an insurance policy. The distinction matters. Insurance protects against uncertain future events. A surety bond is a financial guarantee of a specific obligation: in this case, that a developer will construct roads, sewers, or public infrastructure to an adoptable standard and within the agreed timeframe.
The bond is a three-party arrangement. The developer (the principal) is obliged to carry out the works. The local authority or water board (the obligee) requires the security. The surety provider — Checkmate in this context — issues the bond as a financial guarantee that if the developer fails to complete the works or does not meet the required standards, the authority can call on the bond to fund completion or rectification.
Once the infrastructure is completed to the adopting authority’s satisfaction, the bond is released. Until that point, it remains in force. For developers operating across multiple sites simultaneously, the aggregate bond exposure can be significant — which is why the structure and terms of each bond matter beyond the individual project.
This guide explains:
- What a road or sewer bond actually is, and why it is a surety instrument rather than insurance
- Every section agreement across England, Wales, Scotland and Northern Ireland
- How the bond process runs, from draft agreement to release
- What the defects liability period means for your bond exposure
- How Checkmate structures bonds to protect your working capital
Working capital Arranging a road or sewer bond through a surety provider preserves your credit lines. A bank guarantee requires cash to be ring-fenced or offset against existing facilities. A surety bond is an unsecured credit facility — your bank lines remain available for the things that generate returns.
When is a Road and Sewer Bond required?
Any development that involves the construction of new roads, sewers, or public infrastructure — and where those works are intended to be adopted into the public highway or sewer network — will almost always require a bond. This applies to:
Residential housing
Residential housing developments where new roads and sewers are being constructed to serve the site
Commercial development
Commercial developments requiring new access roads, junction improvements, or highway alterations
Infrastructure projects
Infrastructure projects involving new sewer connections or diversions of existing sewers
Mixed-use schemes
Mixed-use schemes where phased road and sewer adoption is planned across multiple plot releases
The requirement is not discretionary on the developer’s part. It is typically embedded in the planning conditions or within the adoption agreement itself. The local highway authority or statutory water company will specify the bond wording, the required value, and the conditions under which the bond may be called.
The bond value is normally based on the estimated cost of completing the works, often with a contingency margin of 10–25% to account for inflation, delay, or the increased cost of having a third-party complete works that a defaulting developer has left unfinished.
Road bond section agreements
In England and Wales, the legal framework for road adoption bonds is the Highways Act 1980. There are four principal section agreements under this Act, each covering a different type of highway obligation.
In Scotland, road adoption is governed by the Roads (Scotland) Act 1984 rather than the Highways Act 1980. The practical purpose of the bonds is the same — to guarantee that a developer constructs roads to an adoptable standard — but the legal framework and section references differ.
In Northern Ireland, road adoption is governed by the Private Streets (Northern Ireland) Order, administered by the Department for Infrastructure (DfI). The two principal bonds under this framework are the Article 32 and Article 24 bonds.
England and Wales: Highways Act 1980
A Section 38 Agreement is entered into between a developer and the local highway authority when the developer is constructing a new road that is intended to be adopted into the public highway network. Residential estate roads are the most common context, but the agreement applies wherever a new road is being built for adoption.
The bond guarantees that the developer will complete the road to the specification agreed with the highway authority and within the agreed programme. If the developer fails to complete the works — through insolvency, default, or abandonment — the local authority can call on the bond to fund the outstanding works. The bond remains in force until the highway authority formally adopts the road.
The bond value is typically the estimated cost of the outstanding works at any given point in the programme. In practice, many Section 38 bonds are structured to reduce in stages as phases of the roadworks are signed off by the authority’s inspectors.
Where a development requires alterations or improvements to an existing public highway — new junctions, roundabout construction, footpath modifications, traffic signal installations — the developer will be required to enter into a Section 278 Agreement under the Highways Act 1980.
The Section 278 bond guarantees that the developer will carry out the agreed highway improvements to the standard required by the highway authority. It is particularly common on larger residential or commercial schemes where the planning authority has required highway improvements as a condition of consent.
Unlike a Section 38 bond, the works under a Section 278 Agreement are being carried out on existing adopted highway — which typically means a higher scrutiny of specifications and a shorter programme. The bond remains in force until the works are completed and formally signed off.
Under the Advanced Payment Code provisions of the Highways Act 1980, a local highway authority assesses the cost of constructing the highway infrastructure for a development and may require the developer to pay this sum upfront, or alternatively to provide a surety bond covering the estimated cost.
A Section 220 bond is essentially security against the developer’s obligation under the Advanced Payment Code. It is more common on smaller developments where the authority requires financial assurance before construction begins, rather than a full adoption agreement.
A Section 184 Agreement Bond is required where a developer or contractor is constructing a new vehicle access point from private property onto a public highway — a dropped kerb, a new driveway crossover, or a modified access arrangement. The bond guarantees that the work is carried out to the highway authority’s standards and that any damage caused to the public highway during construction is reinstated.
Section 184 bonds tend to be lower in value than Section 38 or 278 bonds but are commonly required on individual plot or commercial unit access works that form part of a larger development.
Scotland and Northern Ireland
A Section 21 Bond is the Scottish equivalent of a Section 38 bond in England and Wales. It is required when a developer is constructing a new road in Scotland that is intended to be formally adopted by the local authority and brought into the public road network.
The bond provides the adopting Scottish local authority with financial security that the road will be completed to the required standard. It covers both the construction period and a defects liability period — typically one to two years — during which any defects identified in the completed road must be rectified by the developer. If the developer fails to do so, the local authority can draw on the bond.
Under Section 56 of the Roads (Scotland) Act 1984, any developer or contractor undertaking works on an existing public road — including works on the verge — must obtain a permit and provide road technical approval. A Section 56 bond provides financial security that the works will be completed to the required standard and that any damage caused to the public road will be remediated.
An Article 32 bond is required when a developer in Northern Ireland is constructing a new private road with the intention of it being formally adopted as a public road by the DfI. It guarantees that the road will be built to the DfI’s required standards before the adoption process can be completed.
An Article 24 bond covers the defects liability period following the construction of a new road in Northern Ireland. Where a Section 32 bond covers the construction phase, the Article 24 bond covers the post-construction maintenance period during which the developer remains responsible for correcting any defects that emerge before formal adoption.
Sewer bond section agreements
Sewer adoption bonds operate under a separate legal framework from road bonds — the Water Industry Act 1991 in England and Wales — but the underlying principle is the same. The developer provides financial security to the statutory water company that new sewer infrastructure will be constructed to an adoptable standard and transferred to the water company’s ownership and maintenance responsibility.
A Section 104 Agreement is entered into between a developer and the statutory water company where new sewer networks are being constructed and are intended to be adopted — transferred from the developer’s ownership to the water company’s. The bond guarantees that the sewers will be constructed to the required specification and standard.
Section 104 bonds are among the most common infrastructure bonds on residential development sites. Any new housing estate with new sewer connections intended for adoption will almost certainly require a Section 104 agreement and bond. The bond remains in force until the water company formally adopts the sewer infrastructure.
Under Section 98 of the Water Industry Act 1991, a developer can require the statutory water company to provide a public sewer to serve a development — a process known as sewer requisition. In return, the developer agrees to cover any annual deficit on the sewer for a period of 12 years, and the bond (or cash equivalent) provides security for this commitment.
Section 98 bonds are typically lower in value than Section 104 bonds but require careful structuring to reflect the 12-year annual deficit guarantee rather than a simple construction cost.
Where an existing public sewer runs through a site and needs to be diverted or altered to facilitate development, the developer enters into a Section 185 Agreement with the statutory water company. The bond guarantees that the diversion works will be completed to the required standard and that the integrity of the existing sewer network will be maintained.
Sewer diversions are complex technically and often carry a higher risk profile than new sewer construction, which is reflected in both the bond value and the terms required by the water company.
In Northern Ireland, sewer adoption is governed by the Water and Sewerage Services Act (Northern Ireland) 2016. Any developer proposing to connect a private sewer to a public sewer must obtain consent from the statutory water company and enter into an Article 161 Sewer Adoption Agreement. The bond guarantees that the new sewer will be constructed to an adoptable standard and formally transferred to the water company.
Quick reference: Road and Sewer Bond section agreements
The table below provides a summary of the principal bond types, the legislation that governs them, and their purpose.
Showing all 12 agreements.
| Section / Article | Legislation | Purpose | Issued by |
|---|---|---|---|
| Section 38 | Highways Act 1980 | Adoption of new road — England & Wales | Local highway authority |
| Section 278 | Highways Act 1980 | Alteration to existing public highway | Local highway authority |
| Section 220 | Highways Act 1980 | Advanced Payment Code — highway construction | Local highway authority |
| Section 184 | Highways Act 1980 | Vehicle access points / crossovers | Local highway authority |
| Section 21 | Roads (Scotland) Act 1984 | Adoption of new road — Scotland | Scottish local authority |
| Section 56 | Roads (Scotland) Act 1984 | Works on existing public roads — Scotland | Scottish local authority |
| Article 32 | Private Streets (NI) Order 1980 | New road construction — Northern Ireland | Department for Infrastructure |
| Article 24 | Private Streets (NI) Order 1980 | Defects liability — Northern Ireland | Department for Infrastructure |
| Section 104 | Water Industry Act 1991 | Sewer adoption — England & Wales | Statutory water company |
| Section 98 | Water Industry Act 1991 | Sewer requisition | Statutory water company |
| Section 185 | Water Industry Act 1991 | Public sewer diversion | Statutory water company |
| Article 161 | Water & Sewerage Services Act (NI) 2016 | Sewer adoption — Northern Ireland | NI statutory water company |
How the Road and Sewer Bond process works
For most developers, the bond process follows a consistent sequence regardless of which section agreement is involved.
- 1
Agreement with the authority
The local highway authority or water company issues a draft section agreement setting out the scope of the works, the required standards, the programme, and the bond wording they require. Review this carefully before proceeding — the bond wording determines the obligations and the conditions under which the bond can be called.
- 2
Financial assessment
The surety provider — Checkmate — assesses the developer's financial position before agreeing to issue the bond. The key factors are liquidity, leverage, the developer’s track record, the complexity of the works, and the aggregate bond exposure already in place across other sites. Strong financial reporting accelerates this process significantly.
- 3
Bond issuance
Once approved, the bond is issued in the form required by the adopting authority. The bond value at this point reflects the full estimated cost of the works. In some cases, particularly on phased developments, the bond can be structured to reduce as phases are completed and formally signed off — reducing the aggregate exposure on the developer's balance sheet as the project progresses.
- 4
Works completion and inspection
The developer constructs the roads, sewers, or infrastructure in accordance with the section agreement. The adopting authority inspects the works, typically in stages, to verify compliance with the agreed standards. Any defects or shortfalls identified during inspection must be remediated before the authority will sign off.
- 5
Adoption and bond release
Once the works are completed to the authority's satisfaction and formally adopted — meaning the authority takes over responsibility for maintenance — the bond is released. For road bonds, this is typically triggered by the formal adoption notice. For sewer bonds, it follows the statutory adoption process under the relevant Water Industry Act agreement.
It is worth noting that the defects liability period complicates this timeline. Even where the primary works are completed and adopted, many agreements include a maintenance period of 12–24 months during which the developer remains responsible for correcting any defects that emerge. The bond may remain in force, or a separate maintenance bond may be required, until this period expires.
The defects liability period and Road & Sewer Bonds
The defects liability period — DLP — is one of the most commonly misunderstood aspects of the road and sewer bond process. Many developers assume that once their roads and sewers are inspected and signed off, their bond obligations end. They often don’t.
Most section agreements include a maintenance or defects liability period, typically 12 to 24 months, that begins when the works are completed and provisionally adopted. During this period, the developer remains responsible for any defects that emerge in the constructed infrastructure. If defects are identified and the developer fails to rectify them, the adopting authority retains the right to call on the bond.
Defects liability period
What the DLP means for your bond
Bond capacity
This has practical implications for developers managing cash flow and bond capacity across multiple schemes. Until formal adoption — which includes the expiry of the DLP — the bond remains a live commitment. Developers should factor this into their programme planning and their discussions with the surety provider at the outset, particularly on phased schemes where adoption timelines may be extended.
DLP Waiver
In certain circumstances, the adopting authority may agree to waive the defects liability period requirements, allowing earlier release of the bond. This is more common on schemes with strong construction quality assurance and where the developer has an established track record with the authority. Checkmate can advise on whether a DLP waiver is appropriate for your project.
How Checkmate arranges Road and Sewer Bonds
Checkmate provides road and sewer bond capacity across England, Wales, Scotland and Northern Ireland, covering the full range of section agreements set out in this guide. Our surety team works directly with developers, contractors, and their solicitors to arrange bonds that satisfy the requirements of the adopting authority without unnecessarily constraining the developer's financial position.
How we structure your bond
We don’t treat bonds as an administrative task. Getting the structure right from the outset — the bond value, the release mechanics, the phasing provisions, and the DLP position — can make a material difference to the working capital implications of a scheme, particularly where bonds are running across multiple developments simultaneously.
Early engagement
we review draft section agreement wording before you commit to terms with the authority, so the bond structure is agreed upfront
Phased bonds
where the scheme allows, we structure bonds to reduce as phases are adopted, releasing exposure progressively
Aggregate facility management
for developers with multiple live schemes, we can manage the portfolio of bonds to optimise capacity utilisation
Working capital preservation
surety bonds through Checkmate do not draw on your bank facilities; your credit lines remain available for the project itself
To arrange a road and sewer bond with Checkmate, you will typically need: the draft bond wording from the local authority or water company, the relevant site plans, your latest full accounts and current management accounts, and details of any other bonds currently in place. Our team will assess quickly and provide terms without unnecessary delay.
Road and sewer bonds sit alongside our wider construction offering — including performance bonds, advance payment bonds and construction insurance — so cover can be structured across the whole contract lifecycle.
Get a Road or Sewer Bond through Checkmate
Whether you are about to enter into a Section 38, Section 104, or any other section agreement, Checkmate can arrange the bond quickly and on terms that work for your project. We work with developers across England, Wales, Scotland and Northern Ireland, on schemes of all sizes — from individual residential plots to large-scale infrastructure projects.
- Bonds across England, Wales, Scotland and Northern Ireland
- Every section agreement, from Section 38 to Article 161
- Draft bond wording reviewed before you commit to terms
- No draw on your bank facilities
Contact our surety team to discuss your requirement. If you have draft bond wording from the local authority or water company, share it with us — we can review the terms and advise on the most efficient structure before you commit.
Frequently asked questions
Common questions from developers and contractors arranging road and sewer bonds.
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