
Professional House Extension Solutions for Surbiton Residents
Transform your Surbiton home with our professional house extension services. Our qualified architects combine local knowledge with innovative design to create extensions that perfectly complement your existing property while maximizing space and value. Whether you're planning a rear extension, side extension, or loft conversion, our Surbiton team delivers exceptional results that exceed expectations.

A recent extension project in the Kingston upon Thames area
Having worked extensively in Surbiton 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 Surbiton projects. We stay current with evolving planning policies and building regulations, ensuring your project meets all current requirements.
Our Surbiton team ensures your house extension project complies with all current planning policies and building regulations. We understand Enfield Council's specific requirements and can advise on the most appropriate approach for your project. From permitted development rights to full planning applications, we provide comprehensive support to ensure regulatory compliance while maximizing your development potential.
Surbiton 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.
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Covering KT6 & surrounding postcodes
Guide prices for house extensions in the Kingston upon Thames area. Every project is different — we provide a detailed, itemised quote after a free site visit.
| Extension Type | Typical Cost |
|---|---|
| Single Storey Rear Extension | £35k – £70k |
| Double Storey Extension | £55k – £120k |
| Side Return Extension | £25k – £50k |
| Wrap-Around Extension | £60k – £130k |
| Loft Conversion (Dormer) | £40k – £65k |
| Kitchen Extension | £30k – £60k |
| Basement Conversion | £80k – £200k |
| Garage Conversion | £15k – £30k |
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.

Professional single storey extension design and planning for ground floor expansions
Typical: 6-12 weeks
Two-storey home extension design maximizing space and value
Typical: 8-16 weeks
Garden-facing extensions creating seamless indoor-outdoor living
Typical: 6-10 weeks
Narrow extensions utilizing side garden space efficiently
Typical: 6-12 weeks
Specialized kitchen and dining space extensions for modern living
Typical: 8-14 weeks
Converting attic space into valuable living areas
Typical: 6-10 weeks
Underground extensions creating additional living space
Typical: 12-20 weeks
Expert guidance through planning applications and permitted development
Typical: 8-16 weeks
Comprehensive extensions combining rear and side elements for maximum space
Typical: 10-18 weeks
Comprehensive whole-house renovation and modernization services
Typical: 12-24 weeks
Expert structural engineering services including underpinning and load-bearing work
Typical: 8-16 weeks
Converting garages into functional living spaces for bedrooms, offices, and studios
Typical: 4-8 weeksFrom the first phone call to moving into your new space — here is what to expect at every stage.
We visit your Surbiton property, discuss your vision, assess feasibility, and give you honest guidance on costs and planning routes.
Our architects create detailed plans, 3D visuals, and construction drawings tailored to your Surbiton home and how you want to live in it.
We prepare and submit your planning application, liaise with the local authority covering Surbiton, and handle building regulations documentation.
Our vetted builders bring the design to life. We oversee the build, conduct regular site visits, and manage quality at every stage.
Final inspections, building control sign-off, snagging checks, and handover — your new Surbiton space is ready to enjoy.
For residential projects in Surbiton, 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 applications in Surbiton require careful preparation and local knowledge. Our team has successfully submitted numerous planning applications across the Enfield area, achieving high approval rates through thorough preparation and understanding of local planning policies. We handle all aspects of the planning process, from initial feasibility studies to final approval.

Extension completed in the Kingston upon Thames area
Building control compliance is essential for all construction projects in Surbiton. Our team provides comprehensive building control drawings and applications, ensuring your project meets all structural, fire safety, and accessibility requirements. We work closely with building control officers to ensure smooth approval processes and compliance with current building regulations.
Our Surbiton clients benefit from our extensive local knowledge, established relationships with planning authorities and contractors, and commitment to delivering exceptional results. We take pride in our ability to transform client visions into reality while respecting local character and meeting regulatory requirements. We offer competitive rates, transparent pricing, and flexible service packages tailored to your specific needs.

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.

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.

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.
Ready to start your house extension project in Surbiton? 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 Surbiton extension services are designed to meet your specific needs, whether you're planning a rear extension, loft conversion, or complete home transformation.
Discover our comprehensive range of house extension solutions in London and surrounding areas
Professional single storey extension design and planning for ground floor expansions
Two-storey home extension design maximizing space and value
Garden-facing extensions creating seamless indoor-outdoor living
Narrow extensions utilizing side garden space efficiently
Specialized kitchen and dining space extensions for modern living
Converting attic space into valuable living areas
Call now to speak with our expert team. Get instant responses and professional guidance for your extension project.