House Extension in Finchley
As a trusted North London specialist, KT5 Construction delivers a smarter, cost-effective House Extension in Finchley. From concept to handover, we combine careful planning, transparent pricing, and value engineering to maximise space and keep projects on time and on budget.
Clear communication is at the heart of our service. With regular updates and one accountable team, your Finchley extension stays aligned with your vision—without stress or overspending.
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 Finchley: What to Expect from a Reliable Partner
Why Choose KT5 for Your Finchley Extension
-
Local insight – We understand Finchley’s mix of Victorian/Edwardian terraces, 1930s semis and post-war homes, and tailor designs that add space while respecting street character.
-
End-to-end service – One accountable team for surveys, 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 We Deliver in Finchley & Nearby
-
Single-storey rear kitchen/dining extensions
-
Side-return and wrap-around layouts to unlock family living space
-
Double-storey additions for extra bedrooms and bathrooms
-
Loft conversions and dormers to maximise attic footprint
-
Garden rooms and orangeries for flexible work or leisure
Every project is planned around your home, neighbours and local guidance to deliver quality, value and compliance.
Our Value-First Approach
-
Budget clarity – Fixed-price contracts to protect against hidden extras
-
Specification smarts – Balanced recommendations across aesthetics, performance and lifecycle costs
-
Transparent comms – Detailed programmes, site updates and clear payment schedules
-
Aftercare mindset – Built for long-term performance, not short-term fixes
How Your Finchley Extension Happens
Consultation & Free Design Offer
We start 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 get your scheme moving from day one.
Planning & Permission
We handle permitted-development checks, planning applications, party wall coordination and building-control approvals—streamlining the paperwork so you don’t have to. We’ll ensure proposals align with Barnet’s local guidance where required.
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 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 Finchley Homeowners Choose KT5 Construction
-
Proven experience across Finchley and wider North London
-
No-surprise pricing and clear payment schedules
-
Attention to detail from planning through to finishes
-
Smart, long-term solutions that add real value
Your Vision, Crafted into Space
Ready to plan a House Extension in Finchley that’s delivered on time and on budget? KT5 Construction is here to help. Book your free consultation to discover how we can save you time, money and stress—while building the home you’ve always wanted.
Frequently Asked Questions
How much does a Finchley house extension cost?
Costs vary by size, design and specification. As a guide:
-
£1,800–£2,500 per m² for standard builds
-
£2,800+ per m² for high-spec finishes
We provide fixed pricing and can phase works to suit your budget.
Do I need planning permission for an extension in Finchley?
Many single-storey rear or modest side-return extensions can fall under permitted development, subject to limits and conditions. We’ll confirm applicability, manage any planning application if required, and liaise with building control and party wall matters.
How long does an extension take?
Programme length depends on scope and complexity. As an indication:
-
Single-storey: around 10–16 weeks
-
Double-storey/complex: around 16–24 weeks
After survey and design, we’ll provide a detailed schedule for your project.
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
"*" indicates required fields
