House Extension in Ewell
Create the extra room you need—without the hassle. As a trusted local builder, KT5 Construction delivers a smarter, cost-aware route to a House Extension in Ewell. From first ideas to final handover, we combine practical design, transparent pricing, and neat project management so your new space lands on time and on budget. Learn more about our approach at KT5 Construction,
At KT5, communication is everything. We keep you fully informed with clear scopes, schedules, and updates at every stage.
What We Do
Building Construction
New Builds, Extensions, Conversions, Renovations
General Building
Property Maintenance, Handyman Service, Decorating
Design
Planning, Design, Project Management, Quality Checking
Ewell Extensions, Done Right
Why choose KT5 for your Ewell project?
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Local insight: We tailor designs for Ewell’s mix of 1930s semis, post-war homes and cottages—maximising light, flow, and storage while respecting the street scene.
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Single accountable team: One partner for surveys, design, permissions, build, and finishing.
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Clarity on costs & programme: Fixed prices, agreed milestones, and regular progress reports—no surprises.
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Value engineering: Smart specifications that stretch your budget without compromising safety, durability, or finish.
Start planning your House Extension in Ewell with a builder that puts value first.
Extension Types We Deliver in Ewell & Nearby
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Single-storey rear extensions to open up kitchen/dining and improve garden connection
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Side-return and wrap-around layouts for bigger family zones without losing too much garden
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Double-storey additions to add bedrooms, bathrooms, or a principal suite
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Loft conversions & dormers to make the most of unused volume
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Garden rooms/orangeries for office, studio, or leisure space
Every scheme is planned for quality, compliance, and minimal disruption on residential streets.
How We Protect Your Budget (and Finish Strong)
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Upfront budget clarity: Fixed-price contracts and staged, transparent payments
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Specification smarts: We recommend materials and systems that balance aesthetics, performance, and lifecycle cost
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Transparent comms: Detailed programmes, site updates, and named points of contact
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Built-in aftercare: We aim for long-term performance—not short-term fixes
From First Sketch to Final Sign-Off
Consultation & Free Design Offer
We start with a home or video visit to understand your goals, budget, and timescales. Choose KT5 as your builder and we’ll include free architectural/structural design to get your scheme moving quickly.
Planning & Permissions
We handle permitted development checks, planning submissions, party wall matters, and building control approvals—streamlining 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 the build stays safe, tidy, and on programme.
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 Ewell Homeowners Choose KT5 Construction
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Local experience across Ewell and wider Surrey
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No-surprise pricing and clear payment schedules
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Rated for punctuality, communication, and attention to detail
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Value-led solutions that add genuine, long-term value
Let’s Plan Your Ewell Extension
Ready to design a House Extension in Ewell that’s on time and on budget? Book your free consultation with KT5 Construction to see how we can save you time, money, and stress—while creating a home that works better for you.
Frequently Asked Questions
How much does a house extension in Ewell cost?
Budgets vary with size, specification, and access. 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 premium finishes and complex structures
We provide fixed pricing and can phase works to suit your budget.
Do I need planning permission for an extension in Ewell?
Many single-storey rear extensions fall under Permitted Development, subject to limits on height, depth, and materials. Larger works (e.g., double-storey, street-facing changes) typically require planning permission. We’ll confirm your route and handle all submissions.
How long does an extension take?
Typical timeframes (after approvals and design):
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Single-storey: ~8–14 weeks
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Double-storey/complex builds: ~12–24 weeks
Programme depends on scope, access, and finishes. We’ll agree a clear schedule before works begin.
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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