Lewisham, Greater London

Home Extensions in Lewisham

Need a home extension in Lewisham, Greater London? Renomate introduces you to vetted specialists who cover your area so you can get quotes and get started with confidence.

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What can we help you with?

Free · no obligation · about 30 seconds

Typical Lewisham cost£25,500–£89,500
Typical timeline3–6 months
Our fee to youFree

Popular options

Home Extensions styles & ideas in Lewisham

Explore common options — then we’ll match you with a Lewisham specialist to bring it to life.

Side Return Extension

Fills the narrow gap at the side to widen your space.

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Wraparound Extension

Combines side and rear for a large L-shaped living area.

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Over-Structure Extension

Builds a new room above an existing single-storey part.

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Garage Conversion + Extension

Reclaim and expand under-used space.

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How much does a home extension cost in Lewisham?

In Lewisham, a home extension typically costs between £25,500–£89,500, depending on the project. London is the most expensive part of the UK for building work, well above the national average — Greater London labour and materials are a real factor. The biggest cost drivers are single vs double storey and floor area, foundations and structural work, and planning, glazing and finish quality. Getting two or three quotes is the best way to see a fair local price, which is exactly what our free matching service arranges.

Figures are a 2025 guide only — your matched installer will give you an accurate, no-obligation quote.

How long does it take?

Once started, expect around 3–6 months for a Lewisham home extension.

  • Check planning permission. Most larger projects need planning and building-regs approval — check early.
  • Hire a structural engineer. Essential where load-bearing walls are removed, for safety and compliance.
  • Plan for the long term. Design for how you’ll use the space in five and ten years, not just now.

How it works

Our Working Process

Our hassle-free process takes you from enquiry to the perfect installer for your home extensions in Lewisham.

1

Fill in Our Form

Tell us what kind of project you’re planning, and your contact details.

2

Introductory Call

We’ll give you a quick call to learn more about what you need and with what budget.

3

We Match You Up

We match you with an approved installer who fits your project requirements.

Local guide

Home Extensions in Lewisham: the 2025 guide

Why a home extension makes sense in Lewisham

A home extension lets Lewisham families stay in the area they love while gaining the space they need. A well-built extension typically adds both significant living space and long-term property value.

Planning your home extension in Lewisham

Careful planning avoids the common pitfalls. Get a detailed quote, agree milestones, and don’t choose on price alone — the cheapest option often costs more in the long run. That’s why our vetting focuses on track record, not just rates.

Local know-how for Lewisham

Homes in and around Lewisham include Victorian and Georgian terraces, flat conversions and new-build apartments on tight urban plots. Those property types influence the best way to plan a home extension — party-wall agreements, borough-specific planning and widespread conservation areas all apply. A local specialist who knows Lewisham will factor all of this into your quote and design.

Choosing the right Lewisham professional

Our free service exists to make this simple. Tell us about your home extension in Lewisham, and we’ll introduce you to a trusted local pro suited to your project and budget — because the installer pays us, not you.

Vetted network

Trusted Lewisham home extensions specialists

We don’t just find you an installer — we find the right one. Every professional we introduce is vetted for experience, qualifications, insurance and a proven track record.

Local Extension Specialist

Professional · Qualified · Insured

Local Project Manager

Professional · Qualified · Insured

Local Planning Expert

Professional · Qualified · Insured

Lewisham questions

Home Extensions in Lewisham — FAQs

The details on cost, timing and how our free matching works in Lewisham.

How much does a home extension cost in Lewisham?
In Lewisham, a home extension typically costs between £25,500–£89,500, depending on the project. London is the most expensive part of the UK for building work, well above the national average — Greater London labour and materials are a real factor. The biggest cost drivers are single vs double storey and floor area, foundations and structural work, and planning, glazing and finish quality. Getting two or three quotes is the best way to see a fair local price, which is exactly what our free matching service arranges.
How long does a home extension take in Lewisham?
Once started, expect around 3–6 months for a Lewisham home extension. Your matched installer will give you a firm schedule once they’ve seen the project.
Do I need planning permission for a home extension in Lewisham?
It depends on the size and type of project and your property. Tight sites, party-wall agreements with neighbours and borough-specific planning rules make an experienced local specialist especially valuable. Your matched Lewisham specialist will tell you exactly what applies and can handle approvals for you.
Is Renomate’s home extensions matching service free in Lewisham?
Yes — it’s completely free for homeowners in Lewisham and across Greater London. We’re paid a small fee by the installer only once your project is confirmed, so we always work in your interest.
How do you choose home extensions professionals in Lewisham?
Every professional we introduce in Lewisham is vetted for experience, qualifications, insurance and customer feedback. We check the details so you deal only with trusted, proven local specialists.

Start your Lewisham project

Free, friendly, no obligation.

  • 100% Free Service
  • No Hidden Fees
  • Friendly, Expert Support
  • Installers Pay Us, Not You

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Ready when you are

Ready for your home extensions in Lewisham?

From fresh ideas to trusted installers, we’re here to get your home renovation project moving—quick, simple, and stress-free.

Get my free quote 01952 928 231
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