Do Granite Setts Count as Permeable Paving? UK Drainage Rules Explained

You may love granite setts, then discover that driveway drainage rules raise a less obvious question: will the finished surface count as permeable? That matters when replacing or enlarging a front driveway.

The short answer is that granite itself is dense, but a granite sett pavement can be designed to manage water through its joints and construction layers. So, when considering granite setts for a driveway, permeability and UK drainage requirements need to be looked at as part of the overall paving design.

Planning a granite sett driveway?

If you are choosing stone now, decide how the paving will drain before agreeing the laying specification. Our granite setts include natural split and finished options, so appearance can be considered alongside the build-up beneath it.

Contact us for a quote, call 0800 246 1212 or email sales@granitesettsuk.co.uk.

Are granite setts themselves permeable?

No. Granite has very low water absorption, so rain does not pass readily through the stone. This is why asking whether granite setts are permeable does not quite tell the whole story. What matters is whether the finished paving allows water to pass through the joints or directs it safely to a suitable permeable area.

A conventional installation with dense mortar joints and an impermeable base behaves as an impermeable surface. A properly designed permeable pavement can instead let water pass through suitable joints into permeable layers below.

What makes a granite sett pavement work with SuDS?

SuDS, or sustainable drainage systems, manage rainfall close to where it lands. Permeable jointing can help granite setts form part of a SuDS-friendly design, but the joints are only one part of the system. Bedding, sub-base, ground conditions and any outlet also matter.

The 2026 British Standard for modular permeable pavements includes natural stone setts to BS EN 1342. It covers systems using permeable jointing with permeable bedding and permeable base or sub-base layers. Our setts conform to EN 1342 and come with a Declaration of Performance; individual characteristics are on our specifications page.

When could planning permission be relevant?

For houses in England, the front-garden rule applies where hard surfacing between the principal elevation and the highway exceeds 5 square metres. Planning permission is generally not required if the surface is porous, or if run-off is directed to a permeable area within the property. Where an impermeable surface exceeds that threshold and does not meet the relevant drainage conditions, planning permission may be required.

For anyone considering granite setts, planning permission and drainage therefore need to be considered together rather than treated as a question of material choice alone. Wales also requires permeable or porous materials, or drainage to a permeable area, for front hard surfaces. Scotland and Northern Ireland have different frameworks, so check the relevant local authority before work starts, especially for listed buildings or altered access.

What should you check before choosing the build-up?

When planning a granite sett driveway, one of the most useful questions to ask your installer is where rainwater will go once it reaches the surface.

Check:

• Whether water passes through the joints or runs across the surface

• Whether the bedding and sub-base are permeable

• Whether the ground can accept infiltration

• Whether an overflow or other drainage route is needed

• Whether water is kept within the property rather than discharged onto the highway.

Permeable jointing over an impermeable foundation is not automatically the same as a full-depth permeable pavement. Soil conditions, levels and existing construction can change the right solution.

Our guide to choosing granite covers tested characteristics and finishes, but the drainage specification should still be agreed for the site.

Granite setts can form part of a suitable drainage design

So, do granite setts count as permeable paving? They can, provided the whole pavement is designed to let water pass through or otherwise manage run-off in line with the applicable planning and drainage requirements. The stone alone does not decide the answer.

If you want natural stone paving to support SuDS requirements, the complete construction, site conditions and applicable local rules matter more than any single product label.

Need help choosing granite setts for your project?

If you would like to discuss sett sizes, finishes or specifications, call us on 0800 246 1212 or email sales@granitesettsuk.co.uk. You can also use our contact page to send us your requirements.

Frequently Asked Questions

Do granite setts absorb rainwater?

No, not to any meaningful degree for drainage design. A permeable sett pavement normally relies on water passing through the joints and layers below.

Can granite setts be used for a SuDS driveway?

Yes. Natural stone setts are included within BS EN 1342 for modular permeable pavements, provided the system is designed and installed appropriately.

Do I need planning permission for a granite sett driveway in England?

Not necessarily. In England, permitted development can apply to a front hard surface over 5 square metres where the surface is porous or run-off is directed to a permeable area within the property. Where these conditions are not met, planning permission may be required.

Is permeable jointing enough on its own?

Not always. The layers beneath the joints, ground conditions and drainage route determine whether the overall pavement can manage rainfall effectively.

Should driveway water drain onto the road?

Generally, the design should manage run-off within the property rather than sending it onto the highway. Check local requirements where drainage is constrained.

18th June 2026