House Extension in Farnham
Create the extra space you need—without the stress. As one of Surrey’s trusted extension specialists, KT5 Construction delivers a smarter, cost-conscious way to expand your home in Farnham. From first sketches to final handover, we focus on careful planning, transparent pricing, and practical cost-saving ideas so you can achieve a beautiful, functional result that fits your budget and lifestyle.
At KT5 Construction, clear communication is central to how we work—we keep you in the loop at every stage so 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
House Extension in Farnham: Work With a Team That Delivers
Why Choose KT5 for Your Farnham Project
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Local insight – We understand Farnham’s housing mix—from period cottages and Victorian terraces to 1930s semis and modern family homes—and design extensions that maximise space while respecting the character of your street.
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End-to-end delivery – One accountable team for design, permissions, build, and finishing, simplifying the whole process.
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Fixed costs & clear programme – Agreed scope, transparent payment schedule, and regular progress updates—no surprises.
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Value engineering – Smart specifications that stretch your budget without compromising safety, durability, or finish quality.
Extensions We Build in Farnham & Nearby Areas
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Single-storey rear kitchen/diner extensions to open up family living
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Side-return and wrap-around layouts to unlock underused space
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Double-storey additions for extra bedrooms, bathrooms, or a home office
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Loft conversions and dormers to make the most of your roof space
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Garden rooms/orangeries for flexible work, wellness, or leisure space
Every project is planned for quality, compliance, and neat delivery in established residential areas.
Our Value-First Approach
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Budget clarity – Fixed-price contracts to protect against hidden extras
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Specification smarts – Material and design options that balance aesthetics, performance, and lifecycle cost
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Transparent comms – Detailed programmes, site updates, and milestone-based payments
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Aftercare mindset – We build for long-term performance, not short-term fixes
How Your Farnham Extension Comes Together
Consultation & Free Design Offer
We begin with a home or video visit to understand your goals, budget, and timeframe. Choose KT5 as your builder and we’ll include free architectural/structural design to move your scheme forward quickly.
Planning & Permissions
We handle permitted development checks, planning applications where needed, party wall matters, and building control approvals. For homes in or near conservation areas or with specific heritage considerations, we’ll tailor the route accordingly.
Construction & Project Management
Your dedicated site manager coordinates trades, inspections, and quality checks—from groundwork and structure through to electrics, plumbing, and final finishes—so your extension is delivered safely, neatly, and to a high 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 Farnham 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
Create the Home Your Routine Deserves
Ready to plan a House Extension in Farnham that’s on time and on budget? Book your free consultation with KT5 Construction to discover 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 Farnham house extension 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 Farnham?
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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