The Section 38 maintenance period nobody budgets for
Short answer
After a Section 38 road is built it enters a maintenance period before the highway authority adopts it. During that time the developer remains responsible for defects, the bond stays in place, and the authority inspects again at the end. Most budgets stop at practical completion and miss it entirely.
The short version
- A Section 38 road is not adopted the day it is finished.
- The maintenance period keeps the defects risk with the developer.
- The bond is not released until the authority issues its final certificate.
- Damage caused by other trades during the period is still your problem.
- Budget for a return visit, because there is almost always one.
The road is built. The kerbs are in. The surface course is down and it looks finished.
It is not finished. Not in the way that matters to your balance sheet.
A Section 38 road enters a maintenance period before the authority will adopt it, and that period is a real commitment with a real cost. Most budgets do not contain it. They stop at practical completion, which is the point where the construction ends and the responsibility does not.
What the maintenance period actually is
It is a holding pattern with teeth.
The authority has agreed, in principle, to take the road on. Before they do, they want to watch it for a while under real traffic and real weather. If something fails, it fails on your watch and you fix it.
At the end there is another inspection. Pass it, and the authority adopts the road and issues a final certificate. The bond is released. That is the moment you are actually done.
| Stage | Who carries the risk | What is tied up |
|---|---|---|
| Technical approval | Developer | Design fees, programme |
| Construction | Developer and contractor | Build cost, bond in place |
| Maintenance period | Developer | Bond still in place, defects liability |
| Final inspection | Developer | Cost of any remedial work |
| Adopted | Highway authority | Nothing — bond released |
Look at the third row. That is the one people forget exists.
Why damage during the period is so common
Here is the practical problem on a housing site.
The estate road gets built early, because everything else needs access along it. Then the housebuilding happens. Deliveries, telehandlers, muck away, scaffolding, skips, all of it running over a road that is already in its maintenance period.
Kerbs get clipped. The surface gets scarred. Gullies fill with site muck. None of that is a construction defect, but all of it shows up at the final inspection and all of it is yours to put right.
The maintenance period rarely fails because the road was built badly. It fails because the site kept using it.
Sequencing is the real lever
You cannot avoid the maintenance period. You can decide when it starts.
Building the base and binder course early, then holding the surface course back until the heavy site traffic is finished, is standard practice for a reason. The road works as a site road. The finished surface only goes down when there is nothing left to wreck it.
It costs an extra mobilisation. It usually costs less than resurfacing a road you already paid to surface.
The same sequencing logic applies to the drainage underneath it, which is even harder to go back to.
What this means for how you price
Three things belong in the budget that usually are not there.
A return visit. Assume you are going back for remedials, because almost everybody does. A small provisional sum beats an unplanned one.
The surface course timing. If you are holding it back, that is a separate mobilisation with its own traffic management and its own price.
Bond duration. Not a cost line, but a financing one. The facility is committed until the final certificate, not until the road looks done.
The cost structure around all of this is covered in more detail in what a Section 278 actually costs a developer — the fee and bond logic is the same family of thinking.
A simple test before you sign anything
Ask one question: what, specifically, releases the bond?
If the answer involves a document nobody has been asked to produce yet, produce it now. If it involves a payment nobody has budgeted, budget it now.
Our full groundworks capability covers the drainage, the kerbs and the surfacing with the same crews, which is the practical reason the records tend to be complete — one contractor kept them.
Got an estate road package to price? Send us the approved drawings and tell us what the site traffic looks like — that second part changes the sequence more than the first.
Common questions
How long is a Section 38 maintenance period?
It is set by the agreement and varies between highway authorities. What matters more than the headline length is when the clock starts, because a dispute about the start date moves the end date and the bond release with it.
Who pays for damage during the maintenance period?
The developer, in almost every case. That includes damage caused by other contractors still working on the site, which is why sequencing the surfacing late is often cheaper than finishing it early and defending it.
What stops the road being adopted at the end?
Usually defects found at the final inspection, outstanding paperwork, or an unpaid commuted sum. None of those are construction problems, which is why they catch people out.
Can we hand over in sections?
Sometimes, if the agreement allows it and the sections are genuinely self-contained with working drainage and access. Ask early rather than assuming, because it changes how you sequence the build.
Do you come back during the period?
Yes. We price the works knowing the maintenance period exists and expect to return for the final inspection. A contractor who disappears at practical completion leaves you holding it.