London and Kent Construction Limited provide total service for all types of house extensions including ground floor flats and apartments, bungalows, chalets and period properties from detailed planning and obtaining the planning permission through to completion and landscaping. Contact us for a free, no-obligation quotation today.

Do you already have plans and planning permission? If so send your extension plans to us for a free no obligation estimate.

If you dont have plans we can provide you with a qualified architect to work with you on your proposed property extension.

How much will a house extension cost?

No extension is the same. They all vary from property to property. So for us to give you the best possible quote for your extension we would have to visit the property to assess the proposed works. We would also always recommend that you get in touch with your local council to see if you can get planning permission.

House Extension – Project 1

This ground floor rear extension was carried out in Colepits Wood Road, London, SE9. Eltham Heights.

Stage 1: House extension foundations and concrete floor over site

These picture’s above show the demolition stages through to the preparation of the over site/ concrete floor slab.First of all we cleared the area and excavated to a depth of 1.2 meters for the foundations. Once the foundations were poured we built up to DPC =Damp Proof Course, We then lay hard core to the area and compact it with heavy machinery. This was then blinded with 50mm of sand.

Stage 2: House extension floor construction and brick work to DPC.

We laid a DPM = Damp Proof Membrane down and lapped this onto the DPC course. We then laid 85mm of Celotec insulation over the floor and 35mm up the walls . The floor was then ready for concreting.

Stage 3: House extension cavity walls and pitching the roof

We then built 2 skins of 100mm Thermalite blockwork/block walls up off the DPC with 70mm of insulation clipped in-between. All lintels and cavity closers were installed and then started to pitch the roof the Velux windows were then installed.

Stage 4: House extension roof tiling, facias and soffits and making good to the disturbed areas of the patio.

The roof was felt and battened ready for tiling. All ventilation UPVC sofits and facias were installed along with the guttering. The roof was then ready for tiling and installing the lead flashings.

Stage 5: Insulation, structural openings and stud walls to the house extension.

Now the new extension is water tight we can carry out all structural openings from the extension to the main house. We carefully shored up the walls ready for the removal of the brickwork. The new concrete padstones were installed and the steels were put place. The timber stud frames were then installed left ready for insulation.

Stage 6: Insulation and scratch coat rendering

The stud walls were then insulated with a Rockwall acoustic insulation. The ceiling to the extension was insulated with 100mm of Celotec in between the joists and 50mm of insulation across the ceiling joist left ready for first fix electrics and plumbing.

Stage 7: Plaster boarding and plastering.

Now the extension has had all of its electrics and plumbing installed its ready to be plaster boarded. We always use the thicker board of 12.5mm . these boards are screwed and not nailed to reduce the plaster from poping and its a stronger fixing. Once the walls and ceilings are boarded we drill holes in the ceilings and walls to bring the lighting cables through. The same goes with the stud walls for the plug sockets. Now all of the walls and ceilings are ready for plastering.

Stage 8: Decoration and the fitting of a Kitchen.

We are nearly there now. All of the walls are lightly sanded to take off any shiny patches as the paint wont adhere properly to these areas. The walls and ceilings have 3 coats of emulsion paint and the timber work has a primer, 2 coats of undercoat and a finish coat. The kitchen is then installed.

Stage 9: Snagging

Once the kitchen is installed everything is checked to make sure its working properly. We then carry out any final snagging along with the client and hand the works over as completed.

Stage 10: Completed

A completion certificate, NIC EIC And the GAS SAFE Certificates are issued to the client. Another superb job competed on time and on budget by London and Kent Construction Ltd.

Project 2

This was a rear extension erected in crown woods road Eltham Heights SE9

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Project 3

A house extension on a detached property in North Park Eltham SE9 london

This is a nice detached property in Eltham South East London SE9 on a good size plot but with small rooms.
We extended the living room and dinning room into the garden to extend them from 4 meters x 5 meters to 8 meters by 5 meters.
We also added a conservatory to the back of the living room. This house extension was carried out under full planning permission. There were also some major structural alterations carried out to the rear bay. Bays on houses are normally the weak point for moving or subsiding and can sometimes need underpinning.

Finished House Extension

House extension
House extension
House extension

Project 4

This was a 1930s semi detached built house in Eltham Heights SE9 with an attached garage.
We demolished the garage and erected a garage with the correct size footings to take a second/double story extension.

House extension
House extension
House extension

Part way through build

We fitted all structural steel work ready for the new concrete block extension to be built on top.

House extension
House extension
House extension

After building the second story to the extension it was time to pitch the roof. Then all internal knock through and structural alterations to the main house could be completed. By extending the house it gained a bedroom with an ensuite bathroom above the garage.

House extension
House extension
House extension

The Roof was now ready for tiling with Redland concrete plain tiles.

House extension
House extension
House extension

Finished pictures of a double story extension to a tudor style house in Eltham Heights SE9 London.

House extension
House extension

Once these works were completed you could not tell it was a house extension as all of the finishes blended in beautifully. Another great house extension carried out by us builders in South East London.

Project 5

This was a 1930s built house with a detached garage in Riefield Road, Eltham SE9.
We demolished the conservatory and erected double story side extension
They gained a bedroom with an ensuite bathroom and a large living room of 10 meters by 4.5 meters.
Just like the project above, once these works were completed you could not tell it was a house extension as all of the finishes blended in beautifully. This extension blended in very well using second hand roof tiles to match existing.This was carried out in Eltham South East London.

Project 6

Wrap around house extension to the side and rear of a semi-detached house in Chislehurst / Petts Wood.

House extension
House extension

This house extension was carried out in Chislehurst, North West Kent.
These pictures show you the semi detached house with 2 bays before the extension.

These pictures show you the digging out of the foundations

Show you the extension going up.
We used a mixture of thurmulite blocks and squint bricks to give a different effect on the corners.

This shows you the under floor heating going in.
We also installed a megaflow system.
Once the pipes and trays go in for the under floor heating the floor gets screeded and tiled.

These pictures show you the side and rear extension complete.The builder’s comment.
I love the small details like the creasing tiles used for the window sills and the corner squint brickwork mixed with the flat render, also the double glazed UPVC windows are set in hardwood frames. Although this is a little more expensive it adds character and finishes it off lovely.

Project 7

Extension to a 1930’s house in Colepits Wood Road, Eltham Heights SE9

We was asked to provide a complete building package for the property, that includes us undertaking the planning /building regulations with the structural calculations right through the build to completion.

Once this house extension was finished it blended in great. We used second hand tiles on the roof and you couldn’t even tell it was an extended addition.

Project 8: Contemporary rear addition extension on a Victorian house

These are pictures of a Victorian house in Beckenham Kent.

First it shows you the existing property before any works has commenced.
We then had to remove a lot of the soil as the garden was a lot higher than the original patio areas.
Once we moved the soil we had to put retaining walls in that the client wanted rendered and turned into a seating area/ benches.
We then set out the footprint of the extension and started to carry out the build.

These show the house extension finished.
You can see the back of the retaining concrete walls and benches

These are the concrete benches that we had built, which also have storage inside them.
The patio area and the seats for the benches will be made out of timber wood decking and are being done at a later date.

This is a shot of the inside of the house extension.
A bit hard to get other photos as it was now full of furniture from other rooms. This was a nice project to construct with the new and old theme.
Sometimes, hard to meet the new straight crisp edges of the new extension with the old twisted character of the original house, but we got there. Who said Good builders were hard to find!

As good builders carrying out house extensions in the following areas SE2 Abbey Wood SE3 Blackheath SE4 Brockley SE5 Camberwell SE6 Catford SE7 Charlton SE8 Deptford SE9 ElthamSE10 Greenwich SE11 Kennington SE12 Lee SE13 Lewisham SE14 New Cross SE15 Peckham SE16 Rotherhithe SE17 Walworth SE18 Woolwich SE19 Norwood SE20 AnerleySE21 Dulwich SE22 East Dulwich SE23 Forest Hill SE24 Herne Hill SE25 SoutNorwood SE26 Sydenham SE27 West Norwood