House Extension in Redhill
Create the extra space you need—without the stress. As one of Surrey’s trusted extension specialists, KT5 Construction delivers a smarter, cost-effective House Extension in Redhill. From first ideas to final handover, we plan carefully, price transparently, and engineer value at every step so your project stays on brief, on time, and on budget.
At KT5, communication is non-negotiable. You’ll get clear updates, milestone check-ins, and a single accountable team from day one.
What We Do
Building Construction
New Builds, Extensions, Conversions, Renovations
General Building
Property Maintenance, Handyman Service, Decorating
Design
Planning, Design, Project Management, Quality Checking
Redhill Extensions, Done Right
Why Choose KT5 for Your Redhill Project
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Genuine local insight – We know Redhill’s housing mix—from Victorian/Edwardian terraces and 1930s semis to post-war homes near Earlswood and Merstham—and design extensions that unlock space while respecting the street scene.
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One accountable team – Design, permissions, build and finishes handled end-to-end. No juggling multiple firms.
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Programme you can trust – Agreed scope, realistic timescales, and regular progress reporting so there are no surprises.
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Value engineering – Smarter specifications that protect quality and longevity while stretching your budget further.
Extensions We Deliver Around Redhill & Nearby (Reigate, Merstham, Earlswood, Horley)
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Single-storey kitchen/dining extensions to open up the rear
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Side-return and wrap-around layouts to transform ground-floor flow
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Two-storey additions for extra bedrooms, ensuites and storage
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Loft conversions and dormers to make the most of your roof volume
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Garden rooms/orangeries for home office, gym or play space
Every scheme is planned for durability, compliance and clean delivery in lived-in residential streets.
Our Value-First Approach
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Budget clarity – Fixed-price contracts and transparent variations—no hidden extras
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Specification smarts – Balanced recommendations for looks, performance and lifecycle cost
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Transparent comms – Detailed programme, site updates and clear payment schedules
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Aftercare mindset – Built for long-term performance, not short-term fixes
How Your Redhill Extension Unfolds
Discovery & Free Design Offer
We start with a home or video consultation to understand goals, budget and timescales. Choose KT5 and we’ll include free architectural/structural design to move your scheme forward from day one.
Planning, Permissions & Compliance
We handle permitted development checks, planning submissions, party wall coordination and building control—streamlining the paperwork so you don’t have to.
Construction & Site 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 specification.
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 Redhill Households Pick KT5 Construction
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Local experience across Redhill and wider Surrey
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No-surprise pricing and clear payment schedules
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Rated for punctuality, service and detail
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Smart, long-term solutions that add real value
Create More Room—Your House Extension in Redhill Starts Here
Ready to unlock extra living space on time and on budget? With KT5 Construction, your House Extension in Redhill is carefully planned, transparently priced and delivered to a proven programme. Book your free consultation to discover smart ways to save money, minimise disruption and achieve the home you’ve imagined. Explore the full service here: House Extension in Redhill.
Frequently Asked Questions
How much does a Redhill house extension cost?
Costs vary by size, design complexity, 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 Redhill?
Many extensions fall under Permitted Development, but factors like size, height, conservation constraints and previous additions can affect this. We check the criteria, advise the best route, and handle applications where needed.
How long does an extension take?
Typical timelines (subject to scope and season):
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Single-storey: ~10–16 weeks
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Double-storey / structural reconfiguration: ~16–28 weeks
Your programme will be agreed up-front and updated throughout the build.
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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