House Extension Haringey | Professional House Extensions in Haringey

Fixiz Ltd delivers professional house extension services across the London Borough of Haringey. Whether you need a single-storey rear extension, a double-storey side extension, or a wrap-around extension, our experienced team will design and build the perfect addition to your home in Muswell Hill, Crouch End, Wood Green, Tottenham, Hornsey, or any surrounding area.

Why Choose a House Extension in Haringey?

Haringey is a diverse North London borough with a wonderful mix of Victorian terraces, Edwardian semis, and period properties. With property values continuing to rise, a house extension in Haringey is the smartest way to gain the space you need without leaving the area you love. A well-planned extension in Haringey can add up to 15-20% to your property value while giving you the kitchen, bedroom, or living space your family needs.

Types of House Extension Haringey Homeowners Choose

Single-Storey Rear Extensions

The most popular type of house extension in Haringey. A rear extension can create a spacious open-plan kitchen-diner, a larger living area, or a dedicated family room. Many single-storey rear extensions up to 6 metres for semi-detached or 8 metres for detached properties can be built under permitted development.

Double-Storey Extensions

Double-storey extensions provide additional space on both floors, typically adding a kitchen-diner below and an extra bedroom or bathroom above. This maximises the value added to your property and is ideal for growing families in areas like Muswell Hill, Crouch End, and Hornsey.

Side Return Extensions

Side return extensions make use of the narrow alley that runs alongside many terraced and semi-detached properties in Haringey. By incorporating this unused space, you can significantly widen your kitchen or living area without losing garden space.

Wrap-Around Extensions

A wrap-around extension combines a side and rear extension into one, creating the maximum amount of additional ground floor space. This is an excellent choice for homeowners wanting a large open-plan kitchen, dining, and living area.

Planning Permission for House Extension in Haringey

Many extensions in Haringey can be built under permitted development rights without requiring planning permission. However, the size, height, and position of the extension must comply with specific rules. Haringey has several conservation areas — including parts of Muswell Hill, Crouch End, and Highgate — where stricter planning controls apply. Our team will assess your property and advise on all planning requirements from the start.

All extensions must comply with building regulations covering foundations, structural integrity, damp proofing, drainage, insulation, and fire safety. Fixiz Ltd manages the complete building control process on your behalf.

House Extension Costs in Haringey

Extension costs in Haringey vary depending on the type, size, and specification:

• Single-storey rear extension: from £32,000
• Side return extension: from £25,000
• Double-storey extension: from £52,000
• Wrap-around extension: from £43,000

We provide fully detailed quotations after a free site survey with no hidden costs or surprises. For more details, see our pricing guide.

Our Extension Process

1. Free site survey and consultation
2. Architectural design and drawings
3. Structural engineering calculations
4. Planning and building control applications
5. Party wall notices where required
6. Construction and project management
7. Final inspection and completion certificate

Why Choose Fixiz Ltd?

• Over 10 years of experience building extensions across North and East London
• Fully insured and CITB certified
• Full project management from design to completion
• Building regulations compliant with full sign-off
• Transparent pricing with no hidden fees
• Free site survey and detailed quotation

Get a Free Quote

Contact Fixiz Ltd today for a free house extension consultation in Haringey. We serve Muswell Hill, Crouch End, Wood Green, Tottenham, Hornsey, Highgate, Alexandra Park, and all surrounding areas. We also offer garage conversions and loft conversions across London.