House Extension Services in Kensington

Professional House Extension Solutions for Kensington Residents

Free Site Visit

Fast Turnaround

Local Kensington Expertise

High Planning Approval Rate

Professional House Extensions in Kensington

Looking for professional house extension services in Kensington? Our experienced team of qualified architects provides comprehensive design solutions for residential projects across Kensington and the surrounding Enfield area. With deep local knowledge of Kensington's planning policies, building regulations, and architectural heritage, we deliver innovative designs that respect local character while meeting modern requirements.

A recent extension project in the Kensington and Chelsea area

Local Expertise

Having worked extensively in Kensington and the surrounding Enfield area, our architects possess deep understanding of local planning requirements, building regulations, and architectural styles. This local knowledge enables us to provide accurate advice, realistic timelines, and cost-effective solutions tailored specifically for Kensington projects. We stay current with evolving planning policies and building regulations, ensuring your project meets all current requirements.

Planning & Regulations

Navigating planning requirements in Kensington requires local expertise and up-to-date knowledge of Enfield Council's policies. Our architects understand the specific requirements for extensions in the area and can guide you through the planning application process, ensuring your proposal has the best chance of approval. We provide advice on design considerations, sustainability requirements, and community consultation processes.

Property Types We Work With in Kensington

Kensington has a diverse housing stock and we have experience extending all property types in the area. Our architects adapt designs to suit the character and structure of each home, whether that means matching original brickwork on a period property or creating a contemporary contrast on a more modern home.

Victorian terraces

Edwardian semis

post-war council houses

1930s semis

modern townhouses

period conversions

Free Quote for Kensington

Tell us about your project and get expert advice within 24 hours.

Get a Free Quote Call 020 3051 9430

Mon–Fri: 9am–5pm

Free site visit & consultation

No obligation quote

Covering SW7 & surrounding postcodes

House Extension Costs in Kensington (2026)

Guide prices for house extensions in the Kensington and Chelsea area. Every project is different — we provide a detailed, itemised quote after a free site visit.

Extension Type	Typical Cost	Build Time	Planning
Single Storey Rear Extension	£35k – £70k	3–4 months	Usually PD
Double Storey Extension	£55k – £120k	5–7 months	Full application
Side Return Extension	£25k – £50k	2–3 months	Usually PD
Wrap-Around Extension	£60k – £130k	4–6 months	Full application
Loft Conversion (Dormer)	£40k – £65k	6–8 weeks	Usually PD
Kitchen Extension	£30k – £60k	3–4 months	Usually PD
Basement Conversion	£80k – £200k	4–8 months	Full application
Garage Conversion	£15k – £30k	4–6 weeks	Usually PD

Prices are guide figures for 2026 based on projects in the Greater London area. PD = Permitted Development (no formal planning application needed in most cases). Actual costs depend on specification, site conditions, and scope.

Our Extension Services in Kensington

Single Storey Extensions

Professional single storey extension design and planning for ground floor expansions

Typical: 6-12 weeks

Double Storey Extensions

Two-storey home extension design maximizing space and value

Typical: 8-16 weeks

Rear Extensions

Garden-facing extensions creating seamless indoor-outdoor living

Typical: 6-10 weeks

Side Extensions

Narrow extensions utilizing side garden space efficiently

Typical: 6-12 weeks

Kitchen Extensions

Specialized kitchen and dining space extensions for modern living

Typical: 8-14 weeks

Loft Conversions

Converting attic space into valuable living areas

Typical: 6-10 weeks

Basement Extensions

Underground extensions creating additional living space

Typical: 12-20 weeks

Planning Permission Services

Expert guidance through planning applications and permitted development

Typical: 8-16 weeks

Wrap Around Extensions

Comprehensive extensions combining rear and side elements for maximum space

Typical: 10-18 weeks

House Refurbishments

Comprehensive whole-house renovation and modernization services

Typical: 12-24 weeks

Structural Alterations

Expert structural engineering services including underpinning and load-bearing work

Typical: 8-16 weeks

Garage Conversions

Converting garages into functional living spaces for bedrooms, offices, and studios

Typical: 4-8 weeks

How Your Kensington Extension Project Works

From the first phone call to moving into your new space — here is what to expect at every stage.

Step 1

Free Consultation

We visit your Kensington property, discuss your vision, assess feasibility, and give you honest guidance on costs and planning routes.

Step 2

Design & Drawings

Our architects create detailed plans, 3D visuals, and construction drawings tailored to your Kensington home and how you want to live in it.

Step 3

Planning & Approvals

We prepare and submit your planning application, liaise with the local authority covering Kensington, and handle building regulations documentation.

Step 4

Construction

Our vetted builders bring the design to life. We oversee the build, conduct regular site visits, and manage quality at every stage.

Step 5

Completion & Sign-Off

Final inspections, building control sign-off, snagging checks, and handover — your new Kensington space is ready to enjoy.

House Extension Services

For residential projects in Kensington, we offer comprehensive extension services including house extensions, loft conversions, garage conversions, and wrap-around extensions. Our designs maximize space and value while respecting the local built environment. We use the latest CAD software and 3D visualization techniques to help you visualize your project before construction begins.

Planning Permission

Our Kensington planning permission services include pre-application advice, full planning applications, and advice on permitted development rights. We work closely with Enfield Council to ensure your application meets all requirements and has the best chance of approval. Our goal is to secure planning permission efficiently while ensuring your project meets all regulatory requirements.

Completed house extension in Kensington area

Extension completed in the Kensington and Chelsea area

Building Control

For Kensington projects, we provide ongoing support throughout the construction process, including site inspections, compliance monitoring, and liaison with building control officers. Our drawings are produced to building control standards, ensuring clear communication of construction details and compliance requirements. Our goal is to ensure your project meets all building regulations while maintaining design quality.

Why Choose Us in Kensington

With years of experience working across the Enfield area, our Kensington team combines creative design skills with practical project management, ensuring your project is delivered on time and within budget. We understand the unique challenges and opportunities presented by extensions in the area and can provide expert advice on the most appropriate design approach for your specific requirements.

Helpful Guides for Your Kensington Extension

Loft Conversions in London: The Complete 2026 Guide to Costs, Planning & Design

Everything you need to know about loft conversions in London in 2026. Dormer, hip-to-gable, mansard and L-shaped options explained with costs, timelines and planning permission guidance.

Kitchen Extensions in London: Ideas, Costs & Planning Permission Guide 2026

Plan your dream kitchen extension in London. Explore side-return, rear and wrap-around options with 2026 costs, planning tips and design inspiration for every budget.

House Extension Costs London 2026: Area-by-Area Price Guide

Updated 2026 price guide for house extensions across London. Costs for single storey, double storey, loft conversions and more — broken down by area and project type.

Frequently Asked Questions About House Extensions in Kensington

How much does a house extension cost in Kensington?+

House extension costs in Kensington vary by type and size. Single storey rear extensions typically range from £35k – £70k, double storey extensions from £55k – £120k, and loft conversions from £40k – £65k. These are guide prices for 2026 — we provide an accurate, itemised quote after a free site visit to your Kensington property.

Do I need planning permission for a house extension in Kensington?+

Many extensions in Kensington can be built under permitted development rights without a formal planning application. This typically covers single storey rear extensions up to certain size limits. However, if your property is in a conservation area, is a listed building, or if the extension exceeds permitted development limits, a full planning application is needed. During our free consultation we assess your Kensington property and advise on the best route — and handle the entire application if needed.

What types of house extensions can you build in Kensington?+

We design and build all types of extensions in Kensington: single storey rear extensions, double storey extensions, side return extensions, wrap-around extensions, loft conversions (dormer, hip-to-gable, mansard), garage conversions, basement conversions, and kitchen extensions. Kensington has a mix of Victorian terraces, Edwardian semis, post-war council houses — we tailor every design to the specific property type.

How long does a house extension take in Kensington?+

Timelines vary by project: a single storey extension typically takes 3–4 months on site, a double storey 5–7 months, and a loft conversion 6–8 weeks. Before construction, the design and planning stage usually takes 8–12 weeks. We map out a detailed programme during your free consultation so you know exactly what to expect.

Do you handle planning applications with Kensington council?+

Yes — we have extensive experience submitting planning applications to the local authority covering Kensington. We prepare all drawings, design & access statements, and supporting documents, then manage communication with planning officers through to decision. Our knowledge of local policies helps avoid unnecessary delays or objections.

What areas near Kensington do you cover?+

We cover Kensington and all surrounding areas within a 20-mile radius. This means we can handle projects across the wider Kensington and Chelsea area, with the same level of local knowledge and expertise you'd get from a firm based in Kensington itself.

Ready to Start Your Kensington Extension?

Ready to start your house extension project in Kensington? Contact our expert team today for a free consultation and detailed project assessment. We offer competitive rates, professional service, and local expertise that ensures your project's success. Our Kensington extension services are designed to meet your specific needs, whether you're planning a rear extension, loft conversion, or complete home transformation.

Get a Free Quote Call 020 3051 9430