Henry Lewis covers UK home extensions, planning permission, and renovation for Home Extensions Now. He has spent the last decade writing about property and the British housing stock, with a particular focus on how London homeowners navigate the planning system and get the most from their builds.
After reviewing dozens of London extension projects this year, the same expensive mistake keeps surfacing. It costs the average homeowner around £45,000 — and it has nothing to do with the building work itself.
A Battersea couple budgeted £180,000 for their rear extension. They completed it for £92,000 — same square meterage, same approved drawings. The decisions that did most of the work weren't on site.
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.
Comparing single storey and double storey extensions for London homes. Costs, planning rules, timelines and which option adds the most value to your property.
Complete guide to house extension timelines. Understand planning timelines, building regulations approval, construction phases, and factors affecting project duration.
Do you need an architect for your house extension? Learn when professional design expertise is essential versus when other options may suffice.
Complete guide to rear house extensions in London. Design ideas for Victorian terraces, costs per sqm, permitted development rules and how to maximise your garden space.
Explore house extension ideas specifically designed for semi-detached homes in London. Learn about single storey extensions, double storey options, and party wall considerations.
Comprehensive guide to extending terraced houses in London. Understand party walls, building regulations, planning challenges, and viable extension options for terraced properties.
Navigate planning permission for house extensions in London. Understand permitted development rules, when permission is required, and how to secure approval.
Comparing house extension costs against moving house costs in London. Analyze financial implications, hidden costs, and help decide which option makes sense for your situation.
Convert your garage into valuable living space in London. Learn about garage conversion costs, planning rules, and how to turn underutilized garages into functional rooms.
Comprehensive guide to living in your house during construction. Manage dust, noise, disruption, and maintain wellbeing while your extension is being built.
Transform narrow side returns in London homes. Learn about side return costs, design options, planning rules, and how to create bright, spacious extensions.
Complete guide to house extension insurance. Understand structural warranty, defects liability, liability coverage, and project insurance protecting your investment.
Create ultimate extension combining side return and rear space. Learn about wrap-around extension costs, design strategies, planning, and transforming London terrace homes.
See real house extension transformations in London. Before and after photos, design decisions, and the impact extensions create on properties and lives.
Comprehensive guide to party wall agreements and procedures. Understand notification requirements, surveyor roles, typical costs, and how to manage party wall processes efficiently.
Understand 2026 building regulations for extensions. Learn compliance requirements, insulation standards, fire safety, ventilation, and the approval process.
2026 update to permitted development rules. Understand what you can build without planning permission and recent changes affecting London homeowners.
Design beautiful open-plan kitchen extensions. Explore layout ideas, zoning strategies, kitchen islands, and creating flexible, social kitchen-living spaces.
Explore which extensions add most property value. Understand ROI for different extension types and maximize return on extension investment.
Understand two storey extension costs in London. Compare value per square metre, planning requirements, timelines, and ROI analysis for double floor extensions.
Master kitchen extension lighting design. Learn about task lighting, ambient lighting, accent lighting, and modern lighting solutions for extended kitchens.
Explore house extension financing options in the UK. Compare loans, mortgages, savings strategies, and how to minimize costs and manage payments affordably.
Detailed month-by-month timeline for house extension projects. Understand realistic progression from initial consultation through final completion.
Extend Victorian and Edwardian properties respectfully. Learn about conservation, heritage compliance, material selection, and creating sympathetic modern additions.
Complete guide to converting garages into valuable living space. Explore design options, building regulations, costs, and planning considerations for London properties.
Learn critical mistakes to avoid when planning and executing house extensions. Expert warnings help prevent costly problems and ensure successful projects.
Explore affordable house extension ideas for budgets under £30,000. Discover cost-effective approaches maximizing value within budget constraints.
Comprehensive guide to house extension planning permission in 2024. Learn about costs, timelines, planning applications, and what to expect from professional house extension specialists.
Discover the key advantages of choosing professional house extension services. From cost savings to creative solutions, learn why specialists are essential for successful projects.
Complete guide to house extension costs in the UK. Learn about fee structures, budgeting tips, and how to get maximum value from your house extension investment.
Navigate the planning application process successfully. Learn each step from feasibility checks through approval, including timelines, common issues, and how to improve approval chances.
Complete guide to building regulations for house extensions. Understand approval requirements, structural standards, fire safety, energy efficiency, and technical compliance.
Complete guide to loft conversions. Learn about different types, costs, planning requirements, and how to maximize usable space in your attic.
Compare single and double storey extensions. Learn about costs, planning permission, construction time, and which option delivers better value for your situation.
Explore current design trends in house extensions. Learn about popular styles, materials, and features that appeal to contemporary homeowners and add lasting value.
Explore financing options for house extensions. Learn about home improvement loans, savings strategies, mortgages, and how to get the best rates for your project.
Navigate party wall requirements for extensions. Learn about notices, surveyors, awards, and how to comply with party wall laws while maintaining good neighbor relations.
Design sustainable extensions that reduce environmental impact. Learn about green materials, energy efficiency, renewable energy, and sustainable building practices.
Design extensions that accommodate aging in place. Learn about accessibility features, universal design, and how to create spaces suitable for changing abilities.
Find and select the right builder for your extension. Learn how to evaluate contractors, check credentials, compare quotes, and ensure quality workmanship.
Design a dedicated home office extension. Learn about ergonomic layouts, lighting, acoustics, and creating a productive, professional workspace at home.
Design indoor pool and spa extensions. Learn about water management, heating systems, ventilation requirements, and creating luxurious wellness spaces.
Convert your garage into usable space. Learn about planning permissions, structural modifications, ventilation, and turning wasted garage space into valuable living area.
Convert agricultural buildings into residential space. Learn about planning rules, structural challenges, building regulations, and creating beautiful homes from barns.
Design and build basement extensions and conversions. Learn about excavation, waterproofing, ventilation, and creating functional underground living spaces.
Extend period and listed buildings respectfully. Learn about heritage considerations, matching materials, planning requirements, and creating sensitive modern additions.
Manage your extension project effectively. Learn about realistic timelines, contract management, communication strategies, and setting expectations for successful completion.
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.