
Professional House Extension Solutions for Hither Green Residents
Looking for professional house extension services in Hither Green? Our experienced team of qualified architects provides comprehensive design solutions for residential projects across Hither Green and the surrounding Enfield area. With deep local knowledge of Hither Green'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 Lewisham area
Our Hither Green team brings extensive local knowledge and professional expertise to every project. We understand Hither Green's unique architectural character, planning policies, and building regulations, ensuring your project progresses smoothly through the planning and building control processes. With years of experience working across the Enfield area, our architects have developed strong relationships with local planning authorities, building control officers, and other key stakeholders.
Navigating planning requirements in Hither Green 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.
Hither Green 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 SE13 & surrounding postcodes
Guide prices for house extensions in the Lewisham 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 Hither Green 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 Hither Green home and how you want to live in it.
We prepare and submit your planning application, liaise with the local authority covering Hither Green, 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 Hither Green space is ready to enjoy.
For residential projects in Hither Green, 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 Hither Green 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 Lewisham area
Our Hither Green building control services include detailed construction drawings, structural calculations, fire safety assessments, and accessibility compliance reviews. We understand the specific building control requirements for extensions in the Enfield area and can advise on structural solutions, thermal performance standards, and sustainability requirements.
With years of experience working across the Enfield area, our Hither Green 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.

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 Hither Green? 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 Hither Green 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.