House Extension in Banstead
As one of Surrey’s trusted extension specialists, KT5 Construction delivers a smarter, cost-effective way to expand your home in Banstead. From first ideas to final handover, we combine careful planning, transparent pricing, and practical value-engineering—so you can create the space you need without stress or overspending.
At KT5, clear communication is everything. We keep you informed at every stage to ensure your vision stays on track.
Explore more about KT5 Construction.
What We Do
Building Construction
New Builds, Extensions, Conversions, Renovations
General Building
Property Maintenance, Handyman Service, Decorating
Design
Planning, Design, Project Management, Quality Checking
House Extension in Banstead: What to Expect from Trusted Experts
Why Choose KT5 Construction for Your Banstead Extension?
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Local know-how – We understand Banstead’s housing mix—inter-war semis and detached homes, post-war terraces, and bungalows—and tailor designs that maximise space while respecting the street scene.
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End-to-end delivery – One accountable team for design, permissions, build, and finishing.
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Fixed costs, clear programme – No surprises—just an agreed scope, transparent schedule, and regular progress updates.
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Value engineering – Smarter specifications that stretch your budget without compromising safety, quality, or longevity.
Proven Track Record Across Banstead & Surrounding Areas
We deliver extensions that suit local property types and lifestyle needs:
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Single-storey rear kitchen/dining extensions
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Side-return and wrap-around layouts to unlock open-plan living
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Double-storey additions for extra bedrooms and bathrooms
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Loft conversions and dormers to utilise the roof space
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Garden rooms/orangeries for flexible home-office or leisure space
Every project is carefully planned to deliver quality, value, and compliance in established residential streets.
Our Value-First Approach
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Budget clarity – Fixed-price contracts to protect against hidden extras
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Specification smarts – Recommendations balancing aesthetics, performance, and lifecycle cost
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Transparent comms – Detailed programmes, site updates, and clear payment schedules
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Aftercare mindset – We build for long-term performance, not short-term fixes
Recent work includes: double-storey house extension with integrated utility; bespoke kitchen refurbishment with a central island; rear extension with wide-span doors to the garden.
Understanding the Extension Process
Initial Consultation & Free Design Offer
We begin with a home or video visit to understand your goals, budget, and timeline. Choose KT5 as your builder and we’ll include free architectural/structural design to move your scheme forward from day one.
Planning & Permission
We handle permitted development checks, full planning submissions with Reigate & Banstead Borough Council, party wall coordination, and building control approvals—streamlining the paperwork so you don’t have to.
Construction & Project Management
Your dedicated site manager coordinates trades, inspections, and quality checks—from groundwork and structure to electrics, plumbing, and finishes—so your extension is delivered safely, neatly, and to the highest standard.
Client Testimonials
“You made it so simple” – Just wanted to say thank you for making what I thought would be a difficult process much easier than I had imagined.
Thank you for my brand new house! The refurbishment and attention to detail makes it feel like a brand new house, but without the expensive cost of moving.
Just wanted to thank you for the work carried out to my new bathroom, I will definitely be in touch shortly to talk about my proposed kitchen extension.
Why Banstead Homeowners Trust KT5 Construction
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Local experience across Banstead and wider Surrey
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No-surprise pricing and clear payment schedules
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Rated for punctuality, service, and attention to detail
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Smart, long-term solutions that add real value
Let’s Build the Space You Deserve
Ready to plan a House Extension in Banstead that’s on time and on budget? KT5 Construction is here to help. Book your free consultation to discover how we can save you time, money, and stress—while building the home you’ve always wanted.
Frequently Asked Questions
How much does a Banstead house extension cost?
Costs vary by size, design, and specification. As a guide:
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£1,800–£2,500 per m² for well-specified standard builds
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£2,800+ per m² for high-spec finishes or complex structures
We provide fixed pricing and can phase works to suit your budget.
Do I need planning permission for an extension in Banstead?
Many smaller extensions fall under Permitted Development, subject to strict criteria (height, depth, materials, neighbours). Larger or more complex schemes typically require planning consent via Reigate & Banstead Borough Council. We advise on the best route and manage the application for you.
How long does an extension take?
As a broad guide, 8–10 weeks for design, permissions, and approvals; then 10–18+ weeks on site depending on scope, access, and finishes. Your programme will be agreed and tracked from the outset.
Will I need to move out during the build?
Not usually for single-storey or moderate schemes. We plan temporary services, dust control, and safe access. For major structural works, a short decant can speed up delivery—your site manager will advise.
Can you help with kitchens, bathrooms, and interiors?
Yes. We provide integrated design, procurement, and installation for kitchens, bathrooms, glazing, flooring, and bespoke joinery—so your new space is ready to live in.
Our Services
House Extensions
KT5 Construction provides professional house or Property Renovations Services in Ash, tailored to your unique needs. Whether you’re expanding your kitchen or creating an open-plan living area, we deliver high-quality results.
Kitchen Refurbishment
At KT5 Construction, we are specialists in kitchen refurbishment in Surrey and surrounding areas, delivering bespoke designs that enhance your living space and add value to your home.
Loft Conversions
At KT5 Construction, we specialise in creating stunning loft conversions in Surrey that add space, value, and style to your home. From dormer loft conversions to luxury loft designs, our expert team handles every detail with professionalism and precision.
Groundworks
At KT5 Construction, we pride ourselves on being the go-to groundwork Company in London, delivering top-quality services for residential and commercial projects.
Bathroom Design & Installation
Your bathroom should be more than just functional—it should reflect your personal style and offer a space to unwind. At KT5 Construction, we specialise in Surrey bathroom design and installation, delivering tailored solutions that blend elegance, practicality, and luxury.
Property Refurbishment
Our Ewell Road Surbiton Project showcases the full spectrum of our refurbishment expertise. By managing every detail, from architectural consultation to final finishes, KT5 ensures each element meets the highest standards.
New Build Homes
As a trusted New Build Builder in Surrey, KT5 Construction has been at the forefront of creating bespoke, high-quality homes designed to meet modern living standards.
Architecture & Design
Expert architectural planning & creative design solutions for residential and commercial projects in Surrey & London.
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