House Extension in Dorking
Create the extra room you need without the stress. As Surrey’s trusted extension specialists, KT5 Construction delivers a smarter, cost-effective way to expand your home in Dorking—blending thoughtful design, transparent pricing, and practical cost-saving strategies from day one.
At KT5, clear communication is everything. We keep you in the loop at every stage so your brief, budget, and timeline stay aligned.
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 Dorking: Built for Your Home and Street
Why Choose KT5 Construction for Your Dorking Extension
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Local insight that saves time – We understand Dorking’s housing mix—Victorian and Edwardian terraces, 1930s semis, post-war homes, cottages, and bungalows—plus the planning sensitivities around the Surrey Hills AONB, green belt fringes, and Mole Valley policies. Your design will look right and read well with planners.
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Single accountable team – From concept and permissions to the final sign-off, we handle it all—design, engineering, build, and finishing.
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Fixed costs, clear programme – No surprises. Expect an agreed scope, transparent schedule, and regular progress updates.
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Value engineering – Smarter specs that stretch your budget without compromising safety, performance, or longevity.
Extensions That Work for Dorking Homes
We tailor each build to your property and street context:
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Single-storey rear kitchen/dining extensions to open up family space
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Side-return or wrap-around layouts for narrower plots and terraces
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Double-storey additions to add bedrooms, ensuites, and storage
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Loft conversions and dormers to unlock underused roof space
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Garden rooms/orangeries for flexible home-office or leisure zones
Every project is planned for quality, value, and compliance in established residential areas across Dorking and nearby villages such as Westcott, Brockham, Betchworth, Pixham, North Holmwood, and Leigh.
Our Value-First Approach
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Budget clarity – Fixed-price contracts and itemised scopes to avoid hidden extras
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Specification smarts – Balanced recommendations for aesthetics, performance, and lifecycle costs
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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
How Your House Extension Happens
Initial Consultation & Free Design Offer
We start 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, Surveys & Permissions
We take care of permitted development checks, full planning applications where required, party wall coordination, structural design, and building control approvals—streamlining the paperwork so you don’t have to.
Construction & Project Management
Your dedicated site manager coordinates trades, inspections, and quality checks—from groundworks and structure to electrics, plumbing, and finishes—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 Dorking Homeowners Trust KT5 Construction
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Local experience across Dorking and wider Surrey
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No-surprise pricing and clear payment schedules
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Rated for punctuality, communication, and detail
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Smart, long-term solutions that add real value
Ready to Plan Your Project?
Let’s design and deliver a House Extension in Dorking that’s on time and on budget. Book your free consultation to see how KT5 can save you time, money, and stress—while building the space you’ve always wanted.
Frequently Asked Questions
How much does a Dorking house extension cost?
As a guide:
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£1,800–£2,500 per m² for standard builds
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£2,800+ per m² for high-spec finishes and complex detailing
We provide fixed pricing and can phase works to suit your budget.
Do I need planning permission for an extension in Dorking?
Many rear and side extensions fall under Permitted Development if they meet size and design limits. Projects outside these limits, flats/maisonettes, or works in sensitive areas may require full planning consent. We’ll confirm the best route and handle all submissions.
How long does an extension take?
Typical on-site durations (after design and approvals):
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Single-storey: ~8–12 weeks
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Double-storey: ~12–20 weeks
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Loft conversion: ~6–10 weeks
Timeline depends on size, structure, and specification.
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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