What types of home extensions are most popular in West London?

The most common types of extensions include:

Rear extensions

Ideal for creating open-plan kitchen and living spaces that connect to the garden.

Side return extensions

Perfect for unlocking unused alleyway space and widening narrow layouts.

Loft conversions

A highly effective way to add extra bedrooms or bathrooms without increasing footprint.

Wrap-around extensions

Combine rear and side space for maximum transformation and flexibility.

Each option can significantly improve how a home functions when designed properly.

How much does a home extension cost in West London?

Costs vary depending on design complexity, specification, and structural work required.

As a general guide:

• Rear extensions: £2,000–£3,500+ per m²
• Side extensions: often higher due to structural complexity
• Loft conversions: vary depending on layout and roof structure

However, the total cost is heavily influenced by:

• Structural changes required
• Level of finishes
• Size and complexity of the design
• Access and site constraints

The most cost-effective projects are those where the design is resolved properly from the start, reducing changes during construction.

What is the most important stage of a home extension?

The design stage is the most important part of any extension project.

This is where decisions are made that affect everything else:

• Room layout and flow
• Natural light and glazing
• Ceiling heights and proportions
• Storage and functionality

Good design ensures the space doesn’t just look better—it feels better to live in every day.

Small architectural decisions, such as rooflights or internal glazing, can completely transform how a home performs.

What is the process of extending a house?

A typical home extension project follows these stages:

1. Initial consultation and feasibility review
2. Measured building survey
3. Concept design and layout options
4. Planning application
5. Building regulations drawings & structural calculations
6. Build Budget & Pre-Construction (introductions to local trusted builders)

Having a structured process helps ensure clarity, reduces risk, and keeps the project moving efficiently.

What are the most common mistakes homeowners make?

Some of the most common issues include:

• Starting construction before finalising design decisions
• Focusing only on size rather than layout and usability
• Underestimating lighting and spatial flow
• Making changes during the build stage

Avoiding these mistakes early often saves significant time and cost later in the project.

Final thoughts: planning a home extension in West London

A well-designed home extension can completely change how you live in your property.

The key is starting with the right design, understanding what is realistically achievable, and planning properly before committing to construction.

If you’re considering a project, we offer a free planning assessment to help you understand your options before you begin.