Finished kitchen near Erith, sage green units, solid wood worktop and a white metro tile splashback

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Erith

Erith, DA8

Extensions and Renovations in Erith

We build extensions, kitchens and bathrooms across Erith. Parts of the town sit inside a conservation area, which changes what you are allowed to build and how long it takes to get agreed. We check your address against the boundary before we quote, and where you are inside one we design to what the council has already said it will accept.

10/10

Checkatrade, 95 reviews

5.0

Google, 14 reviews

2013

Building since

500+

Projects completed

What we do in Erith

Single-storey rear extensions

Kitchen design, supply and installation

Bathrooms, wet rooms and en-suites

Full house renovations and rewiring

Period property repairs and restoration

Structural openings and steel beams

Underfloor heating and floor screeds

Loft conversions where the roofline allows

Plastering, joinery and decoration

Erith houses

Victorian and Edwardian, on wide plots

Most of Erith’s older housing went up between the 1860s and the 1920s, after the railway came. Red brick, timber gables, gothic windows, deep plots and wide gaps between the houses, with grass verges and street trees along the road. Bexley’s conservation area appraisals describe it in those terms and it is still what you see.

The depth at the back of these houses is usually generous. The gap at the side is not, and that gap is the thing the conservation areas exist to keep. So on most jobs here the room to build is behind the house rather than beside it.

Plenty of the work in Erith never touches the outside at all. The kitchen and bathroom further down were done in a house of the same age, 4.7 miles away, and from the street nothing about it changed.

A single-storey rear extension finished in brick with a new step onto the garden

Inside the same rear extension with the glazing in and the floor going down

Tiling under way in a bathroom near Erith

The finished bathroom with a wall-hung vanity and a mirrored cabinet

The finished bath and tiling, looking back from the door

Rear extension in brick, 2.2 miles from Erith

Planning in Erith

What Bexley will accept here

Two conservation areas in the town, four more nearby

Erith Riverside and Lesney Park Road cover parts of the town. Erith Road and Woolwich Road in Upper Belvedere, Crossness in Belvedere and Brook Street in Northumberland Heath are all within a couple of miles. Erith has more of them than anywhere else in Bexley, which has 23 in total. Whether your house is inside a boundary or a street outside one decides most of what follows, so we check that first.

The council has written down what it will accept

For Lesney Park Road, Bexley has published what it will and will not allow. A single storey extension at the back can be acceptable. Going up, or out to the side, usually will not be, because it closes the gaps between the houses. Dormers and rooflights must not be visible from the street. New windows and doors have to match the proportions and the materials of the ones already in the house. The Erith Road appraisal asks for the same things. Build into the space already enclosed at the back, and keep the scale, the detail and the materials in step with what is there.

The Article 4 direction here applies to shops

Erith Town Centre is one of thirteen areas covered by Bexley’s Article 4 direction, made on 22 October 2024 and confirmed on 24 November 2025. It stops shops and offices being turned into flats without permission. It does nothing to your extension, your loft or your alterations.

10/10

Checkatrade, 95 reviews

How we work

How we run a job in Erith

First visit and survey

We look at where your address sits relative to the conservation area boundaries, then the structure, the floors, the services and what the back of the house will take. A fixed price follows, agreed before anything starts.

Inside or outside the boundary

Outside a boundary the national permitted development limits apply, and a single storey rear extension often needs no application. Inside one, a side or first floor addition is unlikely to get through and the detail of the design carries the decision.

Drawings the council can approve

Where an application is needed we draw to what Bexley has asked for, with materials that match the house and openings in the same proportions as the originals. The council says it will only approve well detailed schemes in traditional materials, so that is what goes in.

Consents, notices and permits

Structural calculations, planning or a lawful development certificate, party wall notices, building control and the Bexley skip permit. The permit is £65 for a fortnight and the council asks for two working days. All of it is in the quote.

Structure, then fit-out

Openings, steels and floors first, then first fix, plastering, tiling, joinery and decoration. The same team throughout, so nothing is handed off.

Sign-off

Building control completion certificate, and we walk the job with you before the final payment.

A kitchen and bathroom, 4.7 miles from Erith

Kitchen, Woolwich SE18

Before

The kitchen from the doorway, Kitchen, Woolwich SE18

The cooker and worktop run before the refit, Kitchen, Woolwich SE18

After

The hob wall and splashback, Kitchen, Woolwich SE18

The finished sink run under the window, Kitchen, Woolwich SE18

The same house, the bathroom

Before

After

The finished basin and heated towel rail, The same house, the bathroom

Shower and screen over the bath, The same house, the bathroom

What it costs

See the full cost guide

Small Rear Flat Roof extension illustration showing a glazed corner

Small rear kitchen extension

Flat roof, rooflights, doors onto the garden. About £2,000 to £2,500 per square metre, excluding VAT, the architect and planning fees. Inside a conservation area this is the form Bexley says may be acceptable. All three are starting points from our cost guide, not an estimate for your house.

Estimated Cost

Starting from £45,000

Large Rear Pitched Roof extension illustration showing a rooflight and bi-fold doors

Large rear extension, pitched roof

Across the back with a pitched roof, which sits better behind a Victorian house than a flat one and is easier to argue for on a detailed application.

Estimated Cost

Starting from £60,000

Dormer loft conversion

A rear dormer for a full bedroom with en-suite. Outside the conservation areas this is straightforward. Inside one, Bexley says no new dormer should be visible from the street, so the design has to start there.

Estimated Cost

Starting from £50,000

See the full cost guide

Questions

Questions we get in Erith

01.

Is my house in a conservation area?

Erith Riverside and Lesney Park Road cover parts of the town, and Erith Road, Woolwich Road, Crossness and Brook Street are all within a couple of miles. We check your address against Bexley’s boundaries on the first visit, because it is the one thing that changes what you can build here.

02.

What can I build inside one?

For Lesney Park Road the council has set it out. A single storey extension at the back can be acceptable. Going up, or out to the side, usually will not be, because those close the gaps between the houses that the designation protects. Dormers and rooflights must not be visible from the street. New windows and doors have to match the proportions and materials of the ones already there. Erith Road asks for the same things.

03.

Does the Article 4 direction affect my extension?

No. Erith Town Centre is one of thirteen areas in Bexley’s direction, made on 22 October 2024 and confirmed on 24 November 2025, and it only removes the change of use from Class E commercial to Class C3 dwellinghouses. It applies to shops becoming flats.

04.

What if my house is outside them?

Then you are on the standard Bexley terms, the same as Bexleyheath, Welling and Sidcup, and a single storey rear extension often needs no application at all. We tell you which side of the line you are on before anything is drawn, because it changes both the cost and the timescale.

05.

What does a skip cost here?

£65 for fourteen days, and you or your builder can apply, which is not the case in every borough nearby. Bexley asks for two working days to process it. A deposit is needed if the skip has to stand on a footway, a vehicle crossover or a grass verge. We work out where it goes as part of the quote.

06.

Will I need a party wall agreement?

On a terrace, two notices, one to each neighbour you share a wall with. On a semi, one. On a detached house on one of the wider plots, often none at all. They go out under the Party Wall etc. Act 1996 before work starts and we handle them.