Why Applications for Dropped Kerbs Might Be Refused

Applying for a dropped kerb may seem like a straightforward process—a practical improvement to provide off-street parking, enhance convenience, or even increase property value. Local Highway Authorities apply a stringent set of criteria to ensure that safety, infrastructure integrity and wider community needs are not compromised. As a result, dropped kerb applications are sometimes refused—often to the frustration of homeowners who applied themselves without expert guidance.

1. Inadequate Space for Off-Street Parking

Perhaps the most overlooked reason for refusal is insufficient space within the applicant's property to accommodate a parked vehicle safely. Most Local Authorities usually mandate a minimum of 4.8 metres in depth and 2.4 metres in width for perpendicular parking. If the parking space is in front of a garage or access door, this depth increases to 6 metres.

2. Proximity to Junctions, Crossings, and Bus Stops

Dropped kerbs must be located at least 10 metres from a road junction, increasing to 15 metres in the case of major or heavily trafficked roads. Any proposed crossing within 20 metres of a controlled pedestrian crossing is unlikely to be considered. Proposals that impede a bus stop's functionality are also problematic.

3. Visibility and Sightline Failures

Local Authorities require a pedestrian visibility splay of at least 2 metres by 2 metres, measured from the back of the footway and no higher than 0.6 metres. Vehicular visibility, or “carriageway sightlines,” are measured according to speed limits. For a 30mph road, an unobstructed Y-dimension of 43 metres is required from a setback of 2.4 metres.

4. Highway Trees and Root Protection Zones

The presence of a highway tree within 15 metres of the proposed dropped kerb can be a significant barrier to approval. Applicants must undertake a tree root protection area (RPA) calculation. Councils are under increasing pressure to protect urban trees and enhance biodiversity.

5. Conflict with Street Furniture and Utility Apparatus

Items such as BT and Virgin Media covers, fire hydrants, street name signs, telegraph poles and directional signage can all affect feasibility. All such costs—alongside the responsibility for securing third-party consent—rest with the client.

6. Gates That Open Onto the Highway

A clear distance of at least 5.5 metres must be provided so that vehicles can pull in safely without obstructing the pavement or road.

7. Drainage Concerns

Hardstanding areas must be constructed with permeable surfacing or have adequate drainage provisions to prevent surface water from running off into the public highway.

8. Planning Permission and Legal Authority

Many homeowners mistakenly believe that planning approval automatically authorises construction of a dropped kerb. In fact, the highway authority retains separate and final authority over any work affecting the public highway. Applicants must also be the freeholder or hold written permission.

Conclusion: Preparation Is Key

The refusal of a dropped kerb application can be both costly and disappointing. The good news is that most refusals are entirely avoidable. By carefully reviewing the criteria, undertaking a thorough self-assessment, and seeking our professional planning support before applying, homeowners can avoid many of the pitfalls that lead to unsuccessful applications.

At Dropped Kerb Planning, we specialise in guiding homeowners through this process. Our Chartered Landscape Architect and Town Planner-led approach ensures that applications are not only functional and safe but also sensitive to visual and environmental context.