House Extension in Oxshott

As one of Surrey’s trusted extension specialists, KT5 Construction delivers a smarter, cost-effective way to expand your home in Oxshott. From first ideas to final handover, we combine careful planning, transparent pricing, and practical cost-saving strategies—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.

What We Do

Building Construction

New Builds, Extensions, Conversions, Renovations

General Building

Property Maintenance, Handyman Service, Decorating 

Design

Planning, Design, Project Management, Quality Checking

What to Expect from Oxshott’s Trusted Extension Team

Why choose KT5 Construction for your Oxshott project?

  • Local know-how – We understand Oxshott’s housing mix—detached family homes, 1930s properties and modern developments—so we design extensions that maximise space while complementing your street scene.

  • End-to-end delivery – One accountable team handling design, permissions, build and finishing.

  • Fixed costs, clear programme – No surprises—just an agreed scope, a transparent schedule and regular progress updates.

  • Value engineering – Smarter specifications that stretch your budget without compromising safety, quality or longevity.

Extensions tailored to Oxshott & nearby Surrey

  • Single-storey rear kitchen/dining extensions

  • Side and wrap-around layouts to unlock family living space

  • Double-storey additions for extra bedrooms and bathrooms

  • Loft conversions and dormers to maximise roof space

  • Garden rooms and orangeries for flexible home-office or leisure use

Every project is carefully planned to deliver quality, value and compliance in established residential areas.

Our value-first approach

  • Budget clarity – Fixed-price contracts to protect against hidden extras

  • Specification smarts – Recommendations that balance aesthetics, performance and lifecycle costs

  • Transparent comms – Detailed programmes, site updates and clear payment schedules

  • Aftercare mindset – We build for long-term performance, not short-term fixes

Double-storey house extension  by KT5 Construction.
Custom kitchen refurbishment in Surrey with an elegant island and premium finishes.
Rear house extension featuring sliding glass doors.

How Your Oxshott Extension Takes Shape

Consultation & Free Design Starter Pack

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 & Permissions

We handle permitted development checks, planning applications, party wall coordination and building control approvals—streamlining the paperwork with Elmbridge Borough Council 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 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.

Sean Quinn

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.

Miss A Kenna

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.

Mr J Hitchin

Why Oxshott Homeowners Choose KT5 Construction

  • Local experience across Oxshott and wider Surrey

  • No-surprise pricing and clear payment schedules

  • Rated for punctuality, service and attention to detail

  • Smart, long-term solutions that add real value

Start Your House Extension in Oxshott the Smart Way

If you’re planning a House Extension in Oxshott, we’ll guide you from first design to final handover with clear timelines and no-surprise costs. Book a free consultation today and discover how KT5 Construction makes adding space simpler, faster, and better.

Frequently Asked Questions

How much does an Oxshott house extension cost?

Costs vary by size, design complexity, and specification. As a guide:

  • £1,800–£2,500 per m² for well-specified standard builds

  • £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 Oxshott?

Many projects fall under Permitted Development, but design limits apply (heights, depth, materials, etc.). We confirm eligibility, prepare drawings and manage any Elmbridge Borough Council planning application if required.

How long does an extension take?

Typical timelines (subject to scope and season):

  • Single-storey: ~10–16 weeks

  • 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.

Contact Us

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Office

Wesley House, Bull Hill, Leatherhead, Surrey KT22 7AH