Rear extensions
Often used to enlarge a kitchen, dining room or family space and create a stronger connection with the garden.
House Extensions in West London
Get in touch with us!
Don’t hesitate and contact us today to get a quote on your next project
Check out all of our services
At New Line Construction Ltd we specialise in enhancing and adding value to beautiful period homes in West London.
More space, planned around your home
Extend the house without treating the new space as an afterthought
A successful house extension should improve more than floor area. It should resolve how rooms connect, how daylight reaches the interior and how the property works from one end to the other.
Our construction company in West London can coordinate this work with house refurbishment in West London as part of a wider improvement to your home.
New Line Construction delivers house extensions across West London, coordinating the structural shell, building services, internal layout, joinery and finishes. The aim is a practical addition that feels connected to the existing home rather than simply attached to it.
Whether you are considering a rear extension, side return, wraparound design or an additional storey, the right solution begins with the property, the available space and the way your household wants to live.
One coordinated scopeStructure, services, interiors and finishing planned as one project.
Designed for daily useLayout, storage, light and circulation considered together.
West London coverageLocal service pages for key areas across the west of the city.
Extension options
Choose the form of extension that solves the actual space problem
The best option is not automatically the largest. It is the one that produces a useful layout while responding sensibly to the existing building, access, neighbouring properties and planning constraints.
Side return extensions
Can turn a narrow or underused passage beside a terraced house into valuable internal width and improve the ground-floor plan.
Wraparound extensions
Combine rear and side space. They offer greater layout freedom but require careful attention to structure, drainage and natural light.
Double-storey extensions
May add living space below and bedrooms or bathrooms above, subject to the property, design and relevant approvals.
Kitchen extensions
Bring cooking, dining and social space together while coordinating ventilation, lighting, power, plumbing and fitted storage.
Whole-home projects
Where the extension changes how the rest of the property should work, it can be coordinated with a wider renovation.
Plan the whole ground floor
The new room must work with the rooms you already have
An extension can expose weaknesses in the existing layout. A larger kitchen may still feel awkward if circulation crosses the working area, storage is insufficient or the original middle room becomes dark and disconnected.
Before construction begins, it is worth testing furniture positions, kitchen runs, door openings, views, routes to the garden and the relationship between social and quieter areas. Rooflights, glazed doors and internal openings should be considered as part of the same daylight strategy.
If the rest of the property also requires substantial changes, our house renovation service can coordinate the extension with layouts, services and finishes throughout the home. Where the main opportunity is above rather than beside the house, compare the project with a loft conversion in West London.
From brief to handover01 02 03 04 05
A managed house extension process
Clear early decisions reduce avoidable changes during the build and help structure, services and finishes progress in the right order.
Define the outcome
Discuss the missing space, priorities, preferred layout and how the completed rooms should be used.
Assess the property
Review the existing construction, access, levels, services and the relationship with neighbouring buildings.
Resolve the scope
Coordinate drawings, structural information, approvals, specifications and outstanding product decisions.
Build in sequence
Organise enabling work, structure, weatherproofing, services, internal construction, joinery and finishes.
Complete and review
Finish the agreed details, inspect the completed areas and prepare the new space for use.
Budget and quotation
What affects house extension cost?
Floor area is only one part of the calculation. Ground conditions, structural design, access, drainage, glazing, roofing, heating, electrical work, kitchen or bathroom requirements and the selected finish all influence the price.
A simple cost per square metre cannot describe whether the project involves major steelwork, difficult access, extensive changes to the existing house or bespoke products. Quotations are more meaningful when the scope and specification level are clear.
Useful information before pricing
- Drawings and available structural information
- Planning status and known approval requirements
- Preferred kitchen, bathroom and glazing level
- Required changes to existing rooms and services
- Access restrictions and whether the home stays occupied
Planning and technical coordination
Approvals are part of the programme, not an afterthought
The approvals needed depend on the design, property and location. Some proposals may fall within permitted development rights, while others require planning permission. Building Regulations apply to relevant construction, and structural changes normally require suitable design information.
Party Wall matters, drainage, utilities, conservation constraints and access can also affect the sequence. These issues should be identified early enough to inform the design and realistic start date.
We do not replace the role of the relevant designer, structural engineer or statutory authority. Our construction planning uses the approved and coordinated information supplied for the project.
Local house extension pages
House extension services across West London
Choose the relevant local page for service information and internal links tailored to your area.
House Extension Acton
Rear, side return and kitchen extension planning for homes in Acton.
House Extension Brentford
Coordinated extensions and internal improvements for Brentford properties.
House Extension Chelsea
Carefully planned additions where layout, detail and constrained access matter.
House Extension Ealing
Extensions designed around family living, garden access and existing character.
House Extension Fulham
Rear and side-return options for terraced and period homes in Fulham.
House Extension Kensington
Integrated construction and finishing for high-specification Kensington homes.
House Extension Notting Hill
Thoughtful extensions balancing new layouts with established property details.
Common questions
House extension FAQ
How do I choose between a rear and side return extension?
Start with the layout problem rather than the label. A rear extension adds depth, while a side return can add useful width to a narrow ground floor. A wraparound design combines both, but the best option depends on the plot, daylight, structure and approvals.
Do house extensions always need planning permission?
No. Some proposals may qualify as permitted development, but the rules depend on the property and design, and other approvals can still apply. Confirm the position for the specific project before work begins.
Can we remain in the house during construction?
Sometimes. The answer depends on access, structural openings, dust, noise, loss of kitchen or bathroom facilities and whether essential services can remain safely available. The practical impact should be discussed before the programme is agreed.
How long does a house extension take?
Duration varies with design, approvals, groundworks, structure, access, glazing lead times, service changes and the internal specification. A realistic programme can be prepared once the scope and construction information are sufficiently resolved.
Can the existing ground floor be renovated at the same time?
Yes. Coordinating both scopes can improve floor levels, heating, electrics, lighting, decoration and the transition between old and new areas. It also avoids completing finishes that would need to be disturbed later.
Discuss your extension
Start with the space you need and the home you already have
Tell us what is missing from the current layout, which rooms need to change and how you want the completed property to work.