How Much Does a House Extension Cost in London?
Understand London extension costs, VAT, fees and hidden allowances. Build a realistic project budget before you commission drawings or compare quotes.
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Start here / 5 min readYOUR RENOVATION.
YOUR RENOVATION.
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The homeowner’s reference shelfGOOD QUESTIONS.
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Loft Conversion or Extension: Which Is Right for Your Home?
Compare a loft conversion with a house extension by space, layout, disruption and budget. Work out which project solves the right problem for your home.
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Renovate or Relocate? How to Decide Whether to Improve or Move
Should you renovate your home or move house? Compare the full costs, practical limits and everyday benefits before deciding which route suits your family.
Read the guideWhere to Start With a Full House Renovation
Plan a full house renovation in the right order, from surveys and priorities to budgets, drawings and construction. A practical guide for London homeowners.
Read the guideThe Hidden Costs of Renovating—and How to Budget for Them
Avoid budget surprises during your renovation. Understand exclusions, provisional sums, service upgrades and living costs before building work starts.
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How to Compare Builders’ Quotes Beyond the Bottom Line
Compare building quotes on scope, allowances, VAT, programme and responsibilities. Find out why the lowest headline price may not be the lowest final cost.
Read the guideWhat Should a Building Quote Actually Include?
Know what to look for in a building quotation: scope, specifications, exclusions, payment stages, programme and change procedures before you commit.
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Planning Permission or Permitted Development: What Does Your Project Need?
Understand the difference between planning permission and permitted development in England, and the checks to make before an extension or loft conversion.
Read the guideParty Wall Agreements: What to Know Before Building Work Begins
Understand party wall notices, neighbour responses and surveyors before an extension or loft conversion. Plan the process early and avoid preventable delays.
Read the guideHow Long Does a House Extension Take? From First Sketch to Final Handover
Understand the stages that shape an extension timeline, from design and approvals to ordering, construction and handover, before setting your moving-in date.
Read the guideCan You Live at Home During a Major Renovation?
Decide whether staying home during renovation is practical. Plan safe access, temporary facilities and service interruptions before building work starts.
Read the guideWho Manages Your Renovation? Understanding the Roles of Your Project Team
Understand what architects, engineers, contractors and project managers do, and agree who handles design, site work, costs and decisions on your renovation.
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Side Return Extensions: Making More of a London Terrace
Explore how a side return extension can improve a London terrace. Plan the layout, daylight, structure and budget before filling in the side passage.
Read the guideDormer Loft Conversions: Space, Costs and Design Considerations
Plan a dormer loft conversion around usable space, stairs, bathroom layout and budget. Understand the key checks before committing to a roof alteration.
Read the guideDesigning a Kitchen Extension That Works for Everyday Family Life
Design a kitchen extension around cooking, dining, storage and family routines. Plan circulation, lighting and practical details before choosing finishes.
Read the guideBeyond Open Plan: Creating Connected Spaces With Room for Privacy
Create a connected home with room for quiet. Explore broken-plan layouts, glazed partitions, doors and zoning before removing internal walls.
Read the guideBringing More Natural Light Into Your Home Without Sacrificing Comfort
Plan a brighter renovation with well-placed windows, rooflights and internal openings. Balance daylight with privacy, summer comfort and practical living.
Read the guideWhere to Spend and Where to Save on Your Renovation
Make your renovation budget work harder. Prioritise hard-to-change construction and everyday function, then find sensible savings in scope and finishes.
Read the guideRenovating a Victorian or Edwardian Home Without Losing Its Character
Modernise a Victorian or Edwardian home while respecting its character. Plan layouts, repairs, services and new additions with the original building in mind.
Read the guideThe Final Handover: Snagging, Certificates and What to Check Before Signing Off
Prepare for renovation handover with a practical checklist for snagging, certificates, operating instructions and outstanding work before final sign-off.
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