House Extensions, Home Renovation And Loft Conversion in Shepherds Bush W12 - Design And Build

Homeowners across west London choose Design And Build because our results are backed by verifiable credentials, not vague promises.

• Deep W12 experience – years of delivering home extensions, full home renovation projects and loft conversions specifically in the London Borough of Hammersmith and Fulham
• 97–98% planning approval rate – our understanding of local council planning requirements in Hammersmith & Fulham means applications are prepared to succeed first time
• Fully insured and certified – professional indemnity, public liability and structural warranty coverage on every project
• Completion guarantees – every job comes with a comprehensive guarantee so you have peace of mind long after our builders leave site

Loft Conversions

House extension options include side return extensions and loft conversions – and for many W12 homeowners, going up is as valuable as going out. Loft conversions can add 20% value to your property, and some loft conversions do not require planning permission under current permitted development rights. Common loft conversion types include rear dormer and Velux conversions, with the Velux conversion being the least disruptive option for properties where the existing roof pitch provides adequate ceiling height. Fire safety and insulation are crucial in loft conversion projects, and loft conversions often involve structural adjustments to the property – our team handles all of this, including Building Regulations approval. A well-executed loft conversion typically adds an extra bedroom plus an en-suite bathroom, making it one of the most practical ways to grow a family home.

Full Home Renovation

For homeowners looking to combine a house extension with a broader renovation – new bathrooms, rewiring, replastering, a complete kitchen fit-out – Design And Build also delivers full refurbishment projects across Shepherds Bush. Bringing extension and renovation under one contract reduces cost, shortens your overall timeline and ensures every element of the finished home meets the same high standard of design and craftsmanship.

How Our Extension Process Works

Every house extension in Shepherds Bush follows a clear, managed process – so you know exactly what to expect at each stage.

Step 1: Initial Consultation and Survey

We begin with a free home visit to assess your property’s potential. Our experienced team discusses your requirements, ideas and budget, then carries out a structural survey and feasibility assessment. We identify whether your project falls within permitted development or requires planning permission – and flag any conservation area or Party Wall considerations early, before costs are committed.

Step 2: Design and Planning

Our architect produces detailed architectural drawings and 3D visualisations so you can see exactly what your extension will look like before building work begins. We handle all planning applications or lawful development certificates, coordinate Building Regulations approval – covering structural stability, fire safety, insulation and drainage – and manage the Party Wall Agreement process with your neighbours. A Party Wall Agreement may be necessary when building on shared boundaries, which is common in W12’s terraced streets. Extensions are required to be subordinate to the original house according to local plans, and we design every project with that principle built in.

Step 3: Construction and Completion

Our builders manage the full construction phase on site, with a dedicated project manager providing regular updates and a focus on minimal disruption to your daily life. We use quality materials, maintain a clean and safe site, and ensure every element – from foundations to roof – meets Building Regulations for safety and energy efficiency. On completion, you receive a comprehensive handover including all certification, warranties and aftercare information.

House Extension Results in Shepherds Bush

Design And Build’s Shepherds Bush projects deliver measurable outcomes:

• Property value increases of 5–15% depending on extension type – rear extension projects in Hammersmith and Fulham show value gains of approximately 7.6% on average, while kitchen extensions can add 10% to 15% and loft conversions up to 20%
• Significant space gains – for example, the project at 75 Gayford Road (W12 9BY) combined a ground-floor side return and rear extension with a loft conversion on a Victorian terraced house, with an approximate budget of £200,000 and a build phase of around 6–7 months
• Planning approval success rate of 97–98% for extension applications in the London Borough of Hammersmith and Fulham
• Total project timelines of 9–18 months from initial idea to completion, depending on size, complexity and approvals – a typical rear extension project in W12 completes in approximately 36 weeks from planning to handover
• Entry-level costs for a modest single-storey extension start from approximately £50,000, with larger projects ranging upward depending on scale, specification and structural work

Key aspects of Building Regulations approval include structural stability and fire safety – every Design And Build project is fully compliant. Extensions must comply with Building Regulations for safety and energy efficiency, and we ensure this is never an afterthought.

What Our Shepherds Bush Customers Say

We invite all our W12 clients to share their experience. Testimonials from homeowners across Shepherds Bush – including side return extensions near Goldhawk Road, rear extensions off Uxbridge Road, and loft conversions on streets around Shepherds Bush Green – are available on request. We’re happy to connect you with past clients so you can hear directly about the quality of our craftsmanship, project management and the results we delivered.

Contact us to request references from completed projects in your area of W12.

Areas We Serve in Shepherds Bush W12

Design And Build covers the full W12 postcode and surrounding areas, including:

• Shepherds Bush Green and surrounding streets
• Goldhawk Road corridor and Brackenbury Village
• Uxbridge Road and streets between Shepherds Bush Market and Shepherd’s Bush Common
• White City and areas near Westfield London
• Boundary areas with Holland Park, Hammersmith and Acton
• Properties near central transport links – Shepherd’s Bush (Central Line), Shepherd’s Bush Market (Overground) and Goldhawk Road (District/Hammersmith & City lines)

Shepherd’s Bush is well-connected by public transport options, and our team is based locally – meaning fast response times and efficient site management for every project.

Basement conversions can provide substantial extra living space in urban areas like W12, and we also serve homeowners considering this option where site conditions and planning allow.

Frequently Asked Questions

Do I need planning permission for a house extension in Shepherds Bush?

It depends on the size and type of extension and your property’s status. Permitted development allows for some extensions without full planning permission under certain conditions – for example, a single-storey rear extension within specified depth and height limits. However, planning permission may be required for extensions in conservation areas, and W12 contains several. Many properties in Shepherd’s Bush are subject to conservation area restrictions, and the London Borough of Hammersmith and Fulham has also implemented Article 4 Directions that restrict certain permitted development rights. Our team assesses your property’s specific planning position at the initial consultation, before any design costs are incurred. House extensions can create open-plan kitchens or additional bedrooms – and we’ll identify the best route to approval for your particular project.

How much does a house extension cost in Shepherds Bush?

Costs vary by extension type, size, specification and structural complexity. As a guide for W12 in 2026:

• Single-storey rear extension: £84,000–£125,000 (excluding VAT)
• Double-storey rear extension: £100,000–£170,000+
• Side return extension: from approximately £50,000 for a modest build
• Wrap-around extension: higher due to structural complexity; £2,000–£3,500 per m²
• Loft conversion: £45,000–£80,000+ depending on type and size

Factors affecting your budget include the quality of materials, amount of glazing, structural work required (underpinning, steel beams), and whether the project sits within a conservation area requiring specific finishes. We provide a detailed, itemised quotation after our free site survey so there are no surprises.

How long will my house extension take to complete?

A typical house extension in Shepherds Bush takes 9–18 months from initial consultation to completion. The breakdown is roughly: feasibility and survey (1–2 months), planning and approvals (2–4 months), technical drawings and party wall process (1–2 months), contractor procurement (1 month), materials lead time (1–2 months) and construction (3–6 months). Factors that can extend the timeline include conservation area applications, complex party wall negotiations with neighbours, and seasonal demand for skilled trades. We set realistic expectations at the start and manage the programme actively to keep your project on track.

Will I need a Party Wall Agreement?

In most cases, yes. W12’s terraced housing stock means building work on or near a shared boundary wall – which is common in side return extensions, rear extensions and loft conversions – triggers the Party Wall Act. We manage the entire party wall process on your behalf, including appointing surveyors and liaising with your neighbours to keep things straightforward and professional.

What guarantees do you provide?

Every Design And Build project comes with comprehensive guarantees covering workmanship and materials, plus structural warranty coverage. We also provide all Building Regulations completion certificates, electrical and gas safety certificates, and any planning approval documentation – everything you need for your records and for future buyers.

Start Your Shepherds Bush House Extension Project

Your Shepherds Bush property has more potential than its current layout shows. Whether you need a side return extension to open up a cramped kitchen, a rear extension to connect your living space to the rear garden, a loft conversion to add an extra bedroom, or a complete full home renovation – Design And Build has the local expertise and construction capability to deliver it to a high standard, on budget and on time.

Design And Build · Serving Shepherds Bush W12 and surrounding areas · Call us or request a free quote online to book your free home consultation.