Introduction
House extensions in Westminster are one of the most effective ways to increase living space and add value to your property without relocating. Whether you own a period townhouse, a flat, or a listed building, extending your home can transform both functionality and comfort.
However, Westminster presents unique challenges, including strict planning regulations, conservation areas, and higher construction costs. In this guide, we cover everything you need to know about house extensions in Westminster, including costs, timelines, and expert advice.
How Much Does a House Extension Cost in Westminster?
The cost of a house extension in Westminster is typically higher than in other London boroughs due to property values, access limitations, and regulatory requirements.
Typical costs include:
- Single-storey rear extension: £2,500 – £3,500 per m²
- Side return extension: £2,500 – £3,200 per m²
- Wraparound extension: £3,000 – £4,000 per m²
- Double-storey extension: £2,800 – £3,800 per m²
The final price depends on:
- Property size and layout
- Structural complexity
- Materials and finishes
- Planning constraints
- Access and logistics
Types of House Extensions in Westminster
Rear Extensions
Rear extensions are ideal for expanding kitchens and creating open-plan living areas, which are highly desirable in central London properties.
Side Return Extensions
Common in Victorian and Georgian homes, side return extensions maximise unused space and bring in more natural light.
Wraparound Extensions
Combining rear and side extensions, this option provides the largest increase in space and flexibility.
Basement Extensions
Due to planning restrictions above ground, basement extensions are increasingly popular in Westminster.
Planning Permission in Westminster
Many properties in Westminster are located within conservation areas or are listed buildings. This means:
- Planning permission is often required
- Designs must match existing architecture
- Materials must be approved
- Basement projects require structural reports
Working with experienced professionals is essential to ensure approval and avoid delays.
How Long Does a House Extension Take?
Typical timelines for a Westminster extension project:
- Design and planning: 6–12 weeks
- Planning approval: 8–10 weeks
- Construction: 3–6 months
Larger or more complex projects may take longer.
Challenges of Extending in Westminster
Homeowners in Westminster should consider:
- Limited access for construction
- Strict planning regulations
- Higher labour and material costs
- Neighbour and party wall agreements
Proper planning and expert guidance are crucial.
How Much Value Does an Extension Add?
A well-designed house extension in Westminster can increase property value by:
👉 15% to 25%
This makes extensions one of the best investments for homeowners in central London.
Why Choose Property Refurbishment London?
At Property Refurbishment London, we specialise in high-quality house extensions in Westminster and surrounding areas.
We offer:
- Full project management
- Planning and design support
- High-end finishes
- Transparent pricing
Get a Quote for Your Westminster Extension
If you are planning a house extension in Westminster, our team is ready to help.
👉 Contact us today for expert advice and a tailored quote.
