House Extension in Haslemere
As one of Surrey’s trusted extension specialists, KT5 Construction offers a smarter, cost-effective way to expand your home in Haslemere. 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. Learn more about KT5 Construction.
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
House Extension in Haslemere: How We Work—and Why It Matters
Why choose KT5 Construction for your Haslemere extension
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Local insight that fits your street: From Victorian villas and Edwardian cottages near the town centre to 1930s semis in Shottermill and homes around Grayswood and Hindhead, we tailor designs that maximise space while respecting character and context.
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Single accountable team: Design, permissions, build, and finishing—managed end-to-end by one reliable contractor.
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Fixed costs, clear programme: Agreed scope, transparent schedule, and frequent updates. No guesswork.
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Value engineering built-in: Smarter specifications that stretch budgets without sacrificing safety, quality, or longevity.
Extensions we frequently deliver across Haslemere & nearby villages
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Single-storey rear kitchen/dining extensions
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Side-return and wrap-around layouts to unlock family living space
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Double-storey additions for extra bedrooms and bathrooms
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Loft conversions and dormers to maximise attic footprint
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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 across established residential streets and the Surrey Hills area.
Our Value-Led Method
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Budget clarity: Fixed-price contracts that protect you from 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
Your Extension Journey
Consultation & Free Design Offer
We start with a home or video visit to understand goals, budget, and timeline. Choose KT5 as your builder and we’ll include free architectural/structural design to get your scheme moving from day one.
Planning & Permission
From permitted development checks and planning applications to party wall coordination and building control approvals—we streamline the paperwork so you don’t have to. (We also advise on materials and massing that sit comfortably within Haslemere’s varied streetscape.)
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 Haslemere Homeowners Trust KT5 Construction
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Local experience across Haslemere 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
Design & Build Your Haslemere Extension—Without the Hassle
Thinking about a House Extension in Haslemere? Partner with KT5 Construction for clear pricing, expert project management, and quality workmanship. Start with a free consultation and discover smarter ways to save time and money.
Frequently Asked Questions
How much does a Harrow 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 Harrow?
Many extensions fall under Permitted Development if you meet specific criteria on height, depth, and materials. If permission is needed—conservation areas, larger/additional storeys, or design exceptions—KT5 will manage the application and liaise with the local authority and building control.
How long does an extension take?
Typical timelines (after approvals and pre-construction):
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Single-storey rear: ~8–12 weeks
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Wrap-around/side-return: ~10–14 weeks
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Two-storey: ~12–18 weeks
Final durations depend on scope, access, lead times, and finish level. We’ll confirm a clear programme before work starts.
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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