Dropped Kerb Application: Highways Authority Approval Process, Visibility Splays and Self-Build Rules

Quick Answer: A new vehicle access requires a dropped kerb installed by or with permission of the local highway authority under Highways Act 1980 Section 184. Application fees are typically £100–£250 for the consent and £1,500–£4,000 for the highway authority's contractor to install (or to inspect a third-party install). Visibility splays of 2.4m × 43m (30mph road) or 2.4m × 90m (40mph) are commonly required. Self-installation without consent is an offence and the kerb will be removed at the homeowner's cost.

Summary

Pavers and homeowners frequently underestimate the dropped kerb process. It looks like a simple paving job but it is statutory work on the public highway. The legal framework is the Highways Act 1980 Sections 184 (vehicle crossings) and 130 (protection of public rights), with Section 278 agreements for larger schemes. The local highway authority — typically the unitary, county, or in London the borough — controls who can break out the kerb, who can lay the new one, and what specification it must meet.

The two-stage process — apply for consent, then either pay the authority's contractor or use an authority-approved external contractor — exists for safety reasons. A driveway exit onto a busy road needs visibility splays so that drivers can see oncoming traffic. The kerb construction itself must support utility services (water, gas, broadband) running beneath the footway and survive vehicle crossings. Authorities have technical specifications that vary slightly between councils but follow a common pattern.

For paving contractors, the practical impact is that a driveway quote should always separate the dropped kerb element. The paving install is yours to price; the kerb is the highway authority's. Quoting for both as a single item creates problems when the authority requires its own works.

Key Facts

• Legal basis — Highways Act 1980 Section 184; common law right of access doesn't extend to the right to drive over a footway
• Approval steps — application, technical assessment, fee payment, works installation, inspection, sign-off
• Application fee — £100–£250 for the consent decision (varies by council)
• Construction cost — £1,500–£4,000 for council-installed; £1,000–£2,500 for approved external contractor with council inspection
• Visibility splay — 2.4m × 43m for 30mph roads; 2.4m × 90m for 40mph; 2.4m × 215m for 60mph
• Footway width — driveway must accommodate full footway crossing, typically 2m+ wide
• Kerb specification — typically 125 × 255 dropped kerb units (HB type) on a concrete bed
• Bullnose transitions — quadrant kerbs at the junction with full-height kerb
• Footway construction — Type 1 sub-base typically 200mm with 50mm binder and 25mm surface course; some councils require concrete construction beneath the footway crossing
• Utility checks — buried services (water main, gas main, telecoms) must be checked before excavation; service strikes are excluded from the authority's quote and the contractor's liability if not flagged
• Trees — crossings near street trees usually refused or require root protection design from a tree officer
• Approved contractor schemes — many councils maintain a list of approved external contractors; some require council-only installation
• Lead time — typically 6–12 weeks from application to works start
• Expiry of consent — once granted, consent typically valid for 2 years

Quick Reference Table

Detailed Guidance

Step 1: Pre-application checks

Before applying, check the basics:

• Is the property already served by an existing dropped kerb or accessed from a private road? If so, no application needed.
• Is the road classified? Trunk roads (managed by National Highways) require their consent and rarely permit new domestic accesses; primary A-roads are often refused.
• Is the property in a Conservation Area or near a listed building? Additional design constraints likely.
• Are there street trees in the proposed crossing zone? Tree officer involvement needed.
• Is there a bus stop, pedestrian crossing, traffic island, or junction within close distance? Refusal likely.
• Is the visibility splay achievable from the proposed exit point? Measure on a plan before applying.

The visibility splay is measured from a point 2.4m back from the carriageway edge, projecting along the carriageway in both directions. Within the splay, no obstruction over 1.05m high is permitted (per Manual for Streets and Department for Transport guidance, derived from BS 6517 and DMRB CD 109).

Step 2: Application

Most councils have an online portal. The application requires:

• Property address and applicant details
• Site plan (1:200 or 1:500) showing existing kerb, proposed crossing position, and visibility splays
• Photograph of the existing footway
• Indicative dimensions of the proposed driveway parking area (must be at least 4.8m deep for vehicle off-highway parking)
• Application fee

The council's highways officer reviews the application. Typical decision time is 4–8 weeks.

Step 3: Technical assessment outcomes

Three possible outcomes:

• Approved as proposed — proceed to works
• Approved with conditions — typical conditions include moving the crossing position to improve splay, installing visibility-improving signage, providing a turning area, or limiting the type of vehicle permitted
• Refused — usually due to inadequate visibility, junction proximity, parking conflict, or tree impact

Step 4: Works installation

Two routes for installation:

1. Council-direct installation — pay the authority, they instruct their term-contractor, works completed in a window provided to the homeowner. Cost £2,000–£4,000 typically.
2. Approved external contractor — homeowner appoints an approved-list contractor, council inspects at first-fix and completion. Cost £1,000–£2,500 plus inspection fee. Not all councils permit this route.

The works typically include:

• Excavation of the existing kerb and footway
• Service location (CAT scan, slot trenching as needed)
• Sub-base preparation to council spec (often 200mm Type 1 + 100mm concrete)
• Kerb installation: dropped kerb (HB type) at carriageway edge, transitions either side via quadrant or radius kerbs to standard kerb
• Footway reinstatement to council spec (typically 50mm binder + 25mm surface course in dense bituminous mix)
• Carriageway reinstatement at kerb edge — patch in dense surface course, sealed with hot bitumen at the joint

A typical domestic drop is 4–6m wide overall, with the dropped section taking up the centre 3–4m.

Section 278 agreements — for larger schemes

For new build sites, multi-property developments, or significant access alterations, a Section 278 (S278) agreement is used instead of S184. S278 is a formal legal agreement under which the developer designs and builds the highway works to the council's specification, with the council inspecting and adopting on completion. S278 schemes have:

• Detailed engineering design (drainage, lighting, kerb specs, surfacing)
• A bond covering the cost of the works in case the developer defaults
• Specified maintenance period (typically 12 months) after which the council adopts
• Agreed inspection regime with the council's term-engineer

S278 is typically used for new estate roads, junction improvements, or developments of 5+ houses. A single-house drop kerb is always a S184.

Common refusal reasons and how to address them

• Inadequate visibility splay — sometimes a splay can be created by a hedge cut or wall reduction; the council may approve subject to such works
• Junction proximity — typically a 10m minimum from any side road, more on busier classifications; can sometimes be addressed by repositioning crossing
• Parking enforcement zone — crossings in pay-and-display or residents' permit zones may require additional consultations or are simply refused
• Tree impact — root protection design or alternative crossing position can sometimes resolve
• Bus route issues — crossings on bus routes often refused due to deceleration interference

Self-installation risks

Installing a dropped kerb without S184 consent is an offence. The council can:

• Issue a Section 130 notice to remove the unauthorised crossing
• Recover the removal cost from the property owner
• Bring criminal proceedings (rare but possible)
• Decline future applications

Some homeowners attempt to install the dropped kerb themselves and "wait to see if anyone notices". When the council does notice — often via a neighbour complaint or a routine highway inspection — the kerb is removed at their cost (often £3,000+) and a future application is harder to obtain. Always recommend the formal route.

Frequently Asked Questions

How long does the whole process take?

Realistic timeline: 6 weeks application processing, 4–6 weeks scheduling for works, 1–2 days actual installation. So 11–14 weeks from application submission to completed kerb. Some councils are slower (especially with limited highways teams).

Can I park half-on-half-off the pavement without a dropped kerb?

No. Driving over a kerb damages it and is itself an offence (Highways Act 1980 Section 137). Some councils tolerate it on quiet streets but it is not legal and any kerb damage is the driver's responsibility.

What's the difference between a dropped kerb and a vehicle crossing?

Terminology varies by council. "Dropped kerb" usually refers specifically to the kerb units lowered to footway level. "Vehicle crossing" is the full crossing — kerb plus reinforced footway. They're the same legal application.

My driveway is fine, why does the visibility splay matter?

The splay is about the safety of road users (drivers, cyclists, pedestrians) when you exit your drive onto the highway. Blocked sightlines mean you can't see oncoming traffic and they can't see you. The 1.05m height rule allows for typical pedestrian visibility but blocks high obstructions like dense hedging or walls.

Can the council refuse to install if my driveway is too small?

Yes. Most councils require the off-highway parking area to be at least 4.8m deep × 2.4m wide so the vehicle is fully off the highway. If your front garden is shallower than that, the application will be refused — there's no point creating a crossing if the car ends up half-on-half-off the footway.

Regulations & Standards

• Highways Act 1980 Section 184 — vehicle crossings on a highway

• Highways Act 1980 Section 130 — protection of public rights to use the highway

• Highways Act 1980 Section 137 — wilful obstruction of the highway (driving over kerbs)

• Highways Act 1980 Section 278 — agreements for highway works funded by developers

• Manual for Streets (DfT) — visibility splay design for residential streets

• DMRB CD 109 — geometric design of major/minor priority junctions

• BS EN 1340 — concrete kerb units specification

• BS 7533-1 — pavements constructed with clay, natural stone or concrete pavers — guide for the structural design of heavily trafficked pavements

• Gov.uk: Apply for a dropped kerb — central portal, links to local applications

• Highways Act 1980 (legislation.gov.uk) — primary legislation

• Manual for Streets (DfT) — visibility splay guidance

• Local Government Association highways resources — comparative council practice

• SuDS regulations for driveways — runs in parallel with kerb application

• driveway gradient requirements — geometry that affects approach to kerb

• block paving installation — driveway construction once kerb is in

• tarmac driveway installation — alternative drive surface

• Section 278 highway agreements — for larger schemes