Home Extension
Single-storey, double-storey, side return or wraparound - expertly planned and delivered on time, with clear costs and no unexpected surprises.
Bespoke Home Extensions Crafted for London Living
Typical Build Time
Structural Warranty
Property Value
Who We Are
Building Trust. Creating Space.
Adding Value.
At Reltic Extend, we design and build home extensions London that combine modern living, timeless style, and proven value. With clear pricing, expert planning, and a trusted reputation, we make the journey simple, stress-free, and tailored to you.
- Experience20+ years building home extensions London with proven results.
- PricingWe offer stage-by-stage pricing with no hidden costs or extras.
- PlanningAll planning permission for extensions London handled with ease.
- QualityEvery home extension London includes a 10-year structural warranty.
- SatisfactionOver 60% of new projects come from referrals and repeat clients.
- ServiceA dedicated Project Manager keeps your extension project on track.
Home Extensions Across London: North, South, East & West
At Reltic Extend, we specialise in designing and building bespoke home extensions in London, delivering beautiful spaces tailored to your lifestyle. From stylish rear extensions in North London to contemporary kitchen extensions in South London, innovative wrap-around projects in East London, and elegant double-storey extensions in West London, our portfolio reflects our commitment to quality and detail.
Why Choose Us
Building Trust. Creating Space. Adding Value.
Choosing the right builder for your home extension can be the difference between a smooth, enjoyable project and months of stress. At Reltic Extend, we’ve built a reputation for delivering beautiful, functional spaces with clear communication, fixed pricing, and no nasty surprises.
We know extending your home is a big investment – financially and emotionally. That’s why we focus on what matters most to you:
Peace of mind
A dedicated Project Manager keeps your house extension London running smoothly.
Fixed pricing
Transparent costs so your home extension London stays on budget without surprises.
Expert planning
We manage all planning permission for extensions London, saving you time and avoiding delays.
Proven results
Over 70% of projects at Reltic Extend come from happy client recommendations in London.
The Reltic Extend Promise
Before we even think of starting a design, we will thoroughly analyse the history and physical properties of a site.
Every home extension London we deliver is built with durability in mind. All projects include a full 10-year structural warranty, so you know your investment is protected for the long term. On top of that, our team provides 6 months of aftercare support to resolve any small issues that may appear once you’ve settled into your new space.
We understand how stressful delays and unexpected costs can be. That’s why every house extension London is managed by a single dedicated Project Manager who keeps everything running smoothly. With trades kept in-house, you benefit from tight programmes, efficient scheduling, and no inflated subcontractor mark-ups. The result? Your project is delivered exactly when promised, at the agreed cost.
Paperwork and approvals can be overwhelming. At Reltic Extend, we take care of it all – from planning permission for extensions London to Building Regulations and on-site inspections. You’ll have the confidence of knowing that your extension is legally sound, structurally safe, and built to the highest standards.
Our skilled extension builders in London are fully qualified and bring years of experience across all types of property extensions. From rear extensions to double storey extensions, we deliver quality workmanship, safe working practices, and attention to detail on every project.
Over 60% of our new property extensions London come directly from client referrals. That means homeowners who trusted us were so satisfied with the outcome that they recommended us to family and friends. It’s proof that when you choose Reltic Extend, you’re in safe hands.
We make extending your home in London simple, stress-free, and rewarding. From the first consultation to the final handover, Reltic Extend will manage every step – so you can enjoy the results, not worry about the process.
House Extensions in London – Designed for Modern Living
At Reltic Extend, we believe a home extension is more than just extra space – it’s a chance to reimagine the way you live. With property prices in London rising year after year, moving to a bigger house isn’t always practical. That’s why our bespoke house extensions in London are such a smart solution. Whether you’re dreaming of a light-filled kitchen extension, a spacious rear home extension, or even a multi-level double-storey project, we create spaces that are stylish, functional, and built to last.
Why Choose a Home Extension Instead of Moving?
Extending your property often costs less than buying a new home – and it allows you to stay in the location you love. From side return extensions in South London to contemporary wrap-around extensions in East London, our team helps families unlock the full potential of their homes without the stress of relocating.
We take care of everything, from the first site visit to planning permission and building regulations, giving you peace of mind at every step.
Frequently Asked Questions About Home Extensions in London
Thinking about a double-storey extension but not sure where to begin? You’re not alone – many of our clients have the same questions before starting their project. To make things clearer, we’ve prepared answers to the most common queries about costs, planning, design, and the building process, so you can move forward with confidence.
Yes! At Reltic Extend, we provide a free home extension cost calculator in London that gives you an instant estimate based on your project details. Simply enter your preferred extension type – whether it’s a rear extension, kitchen extension, side return extension, or double-storey extension – along with your property size, and you’ll receive a clear cost guide within seconds. It’s the easiest way to plan your budget before arranging a detailed consultation with our team.
In most cases, yes. Double-storey extensions usually require planning permission, especially in London where space is tight. Our team manages the entire planning process for you, including drawings and applications.
On average, a double-storey extension takes 16 – 24 weeks, depending on complexity. This includes planning, construction, and finishing touches, with our team keeping you updated at every stage.
Absolutely. A well-designed double-storey extension can significantly increase your property’s market value, often by more than the cost of the build itself. It also makes your home more functional and attractive to buyers.
Yes, most clients remain in their homes during construction. We carefully plan the works to minimise disruption and keep your daily life running as smoothly as possible.
The ground floor often becomes a spacious kitchen -diner or family room, while the upper floor can be transformed into bedrooms, a bathroom, or even a home office. The design is entirely tailored to your needs.
Experts in bespoke rear, side, wraparound, kitchen, and double-storey extensions across London.
Our Services
Contact Us
- 4th Floor, Silverstream House, 45 Fitzroy St, London W1T 6EB
- 020 3576 2851
- office@relticextend.co.uk