Driveway Advice
Do I need planning permission for a driveway in Portsmouth?
In England, since October 2008, laying more than 5m² of impermeable hard surfacing in a front garden that drains to the highway generally needs planning permission, whereas a permeable surface — such as permeable resin, open-jointed block paving, or a properly built gravel-and-grid system — or one that drains to a soakaway or border on your own land, generally does not, regardless of size. This is a general planning position, not a guarantee that any specific Portsmouth property qualifies, and properties in a conservation area (such as parts of Southsea, Portchester or Havant's old town) can face additional restrictions — anyone unsure should check with their local planning authority before work starts.
The general rule, in full
Planning Portal's own guidance states it plainly: you will not need planning permission if a new or replacement driveway of any size uses permeable or porous surfacing that allows water to drain through — such as gravel, permeable concrete block paving or porous asphalt — or if the rainwater is directed to a lawn or border to drain naturally. If the surface to be covered is more than five square metres, planning permission will be needed for laying traditional, impermeable driveways that don't provide for the water to run to a permeable area. Below 5m², the size trigger doesn't apply regardless of material.
What counts as "permeable" in practice
In practice that means a permeable resin-bound system, block paving laid with open, permeable joints, or a properly built gravel-and-grid system — each needing a sub-base designed to hold and disperse water, not just support weight. The surface material alone doesn't make a driveway permeable; the build-up underneath has to be specified for drainage, which is why the same material (resin, or block paving) can be built either way.
Where this is especially relevant in Portsmouth
Portsmouth itself sits almost entirely on the reclaimed, low-lying ground of Portsea Island, where surface-water handling is worth checking on almost any job regardless of the planning-permission question. Low-lying and tidal-adjacent parts of the wider catchment — Farlington beside Langstone Harbour, Gosport's peninsula, Hayling Island, and Emsworth and Southbourne near Chichester Harbour — carry genuine flood-risk and drainage considerations on top of the standard planning rule, making a permeable, well-drained build-up a sensible choice independent of whether permission is technically required.
Conservation areas add a separate layer of restriction
Several parts of the wider Portsmouth catchment sit inside a conservation area, which can limit changes to original frontages regardless of the 5m²/permeable rule — the Southsea seafront conservation area covering many Victorian and Edwardian terraces, the area around Portchester Castle's Roman and Norman walls, Havant's historic old-town core, and the historic centres of Emsworth, Titchfield, Wickham, Petersfield and Rowlands Castle. A property inside one of these needs its own check with the local planning authority, separate from the general permeable-surfacing rule.
New-build estates can carry their own restrictions too
Whiteley's planned new-build estate, for example, carries estate-management and design-code constraints on frontage changes as part of the original development — a different kind of restriction to planning permission itself, but one that can equally limit what's possible on a driveway conversion.
This is general information, not a site-specific answer
None of the above is a guarantee that any particular Portsmouth-area property qualifies for permitted development, and it doesn't cover handling or submitting a planning application. Anyone unsure about their own property — especially inside a conservation area, or on a new-build estate with design-code restrictions — should check directly with their local planning authority before work starts.
How to work out where your driveway stands
- Measure the area of impermeable surface being laid in the front garden
- If it's 5m² or under, the size threshold doesn't apply regardless of material
- If it's over 5m², check whether the build-up is genuinely permeable (permeable resin, open-jointed block, or gravel/grid over the right sub-base) or drains to a soakaway/border rather than the highway
- Check whether the property sits inside a conservation area or a design-code-restricted new-build estate, which can add separate restrictions
- If in doubt, confirm with the local planning authority before work starts
| Situation | Permission generally needed? | Why |
|---|---|---|
| Impermeable surface, front garden, over 5m², drains to the highway | Yes | Exceeds the 5m² threshold with no provision for water to drain to a permeable area |
| Impermeable surface, front garden, 5m² or under | No | Below the size threshold regardless of material |
| Permeable surface (permeable resin, open-jointed block paving, gravel/grid) — any size | No | Rainwater drains through the surface itself, whatever the area |
| Impermeable surface draining to a soakaway, lawn or border rather than the highway | No | Water isn't running off toward the road even though the surface itself is sealed |
| Any of the above, inside a conservation area | Check separately with the local planning authority | Conservation-area restrictions apply on top of, not instead of, the general rule |
Frequently asked questions
- Is the 5m² rule specific to Portsmouth, or does it apply everywhere in England?
- It's a general England-wide planning rule, not specific to Portsmouth — it applies to any front garden draining to the highway, wherever the property is, subject to any additional local restrictions such as a conservation area.
- Does a permeable driveway ever still need planning permission?
- Generally no, regardless of size, provided the surface and its sub-base are genuinely built to be permeable — the exemption is about the drainage design, not a size cap.
- My street is in a conservation area — does that override the 5m² rule?
- A conservation area adds a separate layer of restriction on top of the general planning rule, particularly around frontage appearance and materials — it doesn't simply replace the 5m²/permeable rule, so a property inside one needs its own check with the local planning authority.
- Who do I actually ask if I'm not sure my driveway qualifies?
- Your local planning authority is the correct point of contact to confirm whether a specific property and proposed surface qualifies for permitted development — this page and our FAQ give the general position, not a site-specific ruling.
- Does resin bound count as permeable automatically?
- No — resin bound specified with a permeable build-up meets SuDS drainage requirements, but specified over an impermeable base it does not, so the sub-base design is what matters, not just the surface material.
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