House Extensions

House Extensions – London

Make of most of your London home
with a House Extension
Typical London terraced house with rear house extensions

Typical London terraced house with rear extension

London House Extensions
Many terraced houses in London have house extensions

typical London house

House extensions come in all shapes and sizes. For the sake of brevity this page will talk about examples for typical London houses and the most common types of house extension that they allow . We can, of course, complete any type of house extension.
The typical London house is a terraced house meaning that

are the most common.

Side extensions

rear view of typical London house

London terrace house walk through area to back garden

The most common and straight forward London house extension.

Utilising the walk through area to the garden.

It makes good sense to convert this space into real living space inside your property.

Often used to extend kitchen space and/or add a utility room.

This extra dimension adds so much value, monetary as well as dynamically, to your home.

Side Extension

Side Extension

Side return extensions

Steal R S J  Framework defines the house extension

Steal Frame showing the outline of a side return extension

Side Return Extension

Side Return Extension

Side return extensions can be combined with rear extensions to form a wrap-around extension. Wrap-around extensions offer you the maximum amount of flexibility to change the layout of your house and create maximum living space.

Rear Extensions

Rear Extension

Typical London Terraced House – Rear Extension

Space permitting, a rear extension can have an enormous impact on the very nature of your house. This type of house extension when combined with internal alterations to open your kitchen up to your back garden and creating a comfortable open-plan area that can be utilised as a combined kitchen, dining, living area.

Demolition of existing structure, as required

Remove existing structure as required, keeping disturbance to a minimum

Remove existing structure as required

The first stage of the process would be to remove any existing section of the house, in this case the old kitchen.

Demolition and correct disposal of rubble.

Prepare exiting brickwork for future joining of new brickwork.

Clearing the Ground

Staking out the gorund

Staking out the ground

Clearing all the ground

Ground clearance

Once the old kitchen is cleared we then do the ground clearance work.

Any plants that need to be re-planted should be pointed out prior to this stage.

It’s probably better if you clear the plants you want to keep before we start. The Ground is then ready to be marked out, in accordance to the plans.

Laying the Foundation

Building foundation layers

Foundation laid

Foundation Trench

Foundation Trench

The trenches for the foundation can then be dug ready for the laying of all the foundations with strict accordance the plans and architecture of the extension.

The new building foundation will be either strip, wide strip or raft and pile.

A 600mm wide, 1 metre deep trench will suffice For the majority of extensions, dependent on the kind of soil.

The whole point of foundations is to give a good firm footing on which the extension is to be constructed. Additional to protect against soil heave – any future movement of the ground around the extension.

Laying drainage pipes

Laying of the drainage system

Drainage pipe laid at this stage

Next, all the drainage system is laid in place, inspection of this required before the backfilling can proceed.

Steal work

Steal Framework

Side Return Steal Framework

Steal Base sitting in foundation trench

Steal Base sitting in trench

Now the construction starts to take shape as the steel work is put in place. Usually consisting of fabricated steel sleepers, uprights and R.S.J’s. All, of which have been designed by the structural engineer.

This may involve primary and secondary framing.

The key to success for any steel building project starts with a properly prepared and executed foundation.

Laying the concrete floor

Concrete floor with steel re-enforceing

Next the floor goes down

The laying of the concrete floor starts with a layer of hardcore then sub base and the all important damp proofing. It is at the stage that the openings are formed.

Large areas

If we are laying a large area of concrete, more that 4m wide or long then we will lay it in sections to prevent it from cracking during expansion and contraction. To do this, we divide the formwork(wooden surrounds) into bays with control joints between the sections.

After each section has been laid we can remove the supports and lay the next section of concrete.

Brickwork stage

brick laying starts

Brick work can now start

Building internal and external walls and adding roof.

Once the floor has hardened the brickwork for the walls can begin which in turn enables the roof to be fitted.

This is when the whole structure starts to really take shape.

It is at this stage any access scaffolding can be erected

Doors and Windows

Hanging of the doors

Door hanging

Window fitting

Fitting of windows

Now the fitting and hanging doors and windows can start

The new windows will come with a new exterior window frame. These are inserted into the frame into the opening using wedges to fit under the sill to push it up against the brickwork.

The sill will be perfectly square and using a spirit level the sill will be checked to make it is completely horizontal before fixing.

Next using the spirit level again to check the angle of the jambs, which will be vertically upright. Using wedges to push them into position if necessary. Checking with the spirit level and adjust the wedges as necessary. Once we are satisfied that the frame is perfectly square, it can be secured to the brickwork. Drill holes through the frame and brickwork at intervals.

Electricians to lay wiring.

The electrician lay the cabling

Electrician lay cabling

Prior to the plasterer we can have the electrician lay all the cabling.

cable ducting

all cabling requires 17th Edition IEE certificate.

by certified an approved electrician

There is the “first fit” for all the cabling and back boxes followed by the “second fit” of all the fittings

included lots of contingencies for various future wiring

Plastering stage

Interior walls and ceiling plastered as required.

Plastering and rendering makes everything look neater

Plasterers start their work


tiles go down

Ceramic floor tiles

Then the flooring goes in. Be it wood or tiled depending on the primary use of the house extension.

Fixtures and fittings

Tiles and bathroom items

Floor tiles fixtures and fitting

kitchen or bathroom fitting as required.
Most extensions will include the fitting of an extra W/C

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