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Thornton Heath · French drains

French Drains in Thornton Heath

Drainage that works under clay.

We install French drains in Thornton Heath to intercept water and lead it to a soakaway or suitable outlet, drying out lawns, borders and paths.

Free site survey · A quote tailored to your garden

Custom timber pergola over the cleaned crazy paving side return in Thornton Heath CR7
Custom pergola, French drains and garden refresh in Thornton Heath, March 2026↗
Thoughtful designCareful installationClear written quotesWorkmanship warranty

Your garden, considered

How French drains work

A French drain is a trench filled with gravel and a perforated pipe, wrapped in a membrane, that collects water and carries it away.

We position drains to intercept water, connect them to a suitable outlet and reinstate the surface.

For Thornton Heath lawns on clay, French drains across the slope help dry the ground.

Materials & possibilities

French drain options

Positioned for the problem.

01

Boundary drains

Stop run-off

At the top of slopes.

02

Lawn drains

Dry lawns

Across wet areas.

03

House drains

Protect walls

Along foundations.

04

Outlets

Where it goes

Soakaways or approved connections.

An outlet is essential

A French drain must lead somewhere. Without a soakaway or suitable outlet, it simply fills up.

From first ideas to finishing touches

A clear path to your finished garden.

  1. Survey

    Find wet areas and falls.

  2. Design

    Route and outlet.

  3. Install

    Trench, pipe and gravel.

  4. Reinstate

    Turf or paving.

Crazy paving side return in Thornton Heath being jet washed Custom timber pergola over the cleaned crazy paving side return in Thornton Heath CR7

Documented project · Thornton Heath CR7

Custom pergola, French drains and garden refresh in Thornton Heath

This documented project is in Thornton Heath. A custom-made pergola over the side return, crazy paving jet washed and regrouted, around 15m of French drains connected to the gullies with panda gravel, and random concrete stepping stones across the lawn, in four days for £7,500 including VAT. Read the full case study for photos, scope and timings.

Read the full case study: how we built it

A complete quote, not a guess

What affects the cost?

Length, depth, outlet and reinstatement.

Request your free quote
Length
Trench length.
Outlet
Soakaway or connection.
Reinstatement
Surface finish.

Compare like for like. Check trench depth, pipe, membrane and outlet.

Thornton Heath · CR7

French Drains planned around your Thornton Heath property

We take french drains enquiries across Thornton Heath, including Norbury, Selhurst and Thornton Heath Pond. Thornton Heath is close to our Norbury base. Its Edwardian and interwar terraces have medium rear gardens on London clay. Our base is in Norbury, SW16, about 1 mile from Thornton Heath.

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A few useful answers

French Drains in Thornton Heath: your questions

Still deciding? Tell us about your garden and we can talk through the next step.

Read our warranty terms
Do French drains work on clay in Thornton Heath?

Yes, if they lead to a suitable outlet.

How deep is a French drain?

Typically 450–600mm, depending on the problem.

Will I see the drain?

It can be hidden under turf or finished with decorative gravel.

How long does it last?

Many years with a membrane to stop silt.

Do you cover all of Thornton Heath?

Yes. We work across Thornton Heath (CR7), including Norbury, Selhurst and Thornton Heath Pond, and nearby areas such as Norbury and Upper Norwood. Our base is in Norbury, SW16, about 1 mile from Thornton Heath.

Let's make a start

Your next chapter
starts in the garden.

Tell us about your french drains project in Thornton Heath. We will get in touch to discuss your ideas and the next step towards a site survey.

020 3633 5529 info@finelandscape.co.uk

Fine Landscaping
31 Tylecroft Road, Norbury, London SW16 4BL

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