Portsmouth, Hampshire

Home Extensions in Portsmouth

Thinking about a home extension in Portsmouth? Skip the endless searching — we find you a trusted local pro suited to your project and budget. It’s free for homeowners, always.

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What can we help you with?

Free · no obligation · about 30 seconds

Typical Portsmouth cost£23,000–£80,500
Typical timeline3–6 months
Our fee to youFree

Popular options

Home Extensions styles & ideas in Portsmouth

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

Single-Storey Rear Extension

Extends the back of the house for open-plan living.

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Two-Storey Extension

Adds a room downstairs and a bedroom or bathroom above.

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Side Return Extension

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

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Over-Structure Extension

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

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How much does a home extension cost in Portsmouth?

A typical Portsmouth home extension works out at about £23,000–£80,500 in 2025. South East costs typically run above the UK average — Hampshire labour and materials are a real factor. What you pay depends mainly on single vs double storey and floor area and foundations and structural work, plus 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?

On site, a home extension in Portsmouth generally runs to 3–6 months.

  • 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.
  • Set a clear budget. Allow a 10–15% contingency for unforeseen costs during the build.

How it works

Our Working Process

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

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 Portsmouth: the 2025 guide

Why a home extension makes sense in Portsmouth

Across Hampshire, a thoughtfully designed home extension adds comfort day to day and appeal when it’s time to sell. A well-built extension typically adds both significant living space and long-term property value.

Planning your home extension in Portsmouth

Start with a clear brief and a firm budget. Confirm what each Portsmouth quote includes, ask about timescales, and make sure any approvals are handled before the first day on site.

Local know-how for Portsmouth

Portsmouth and the wider Hampshire area are known for interwar and Victorian homes, New Forest cottages and naval-city terraces. The style of local homes matters for a home extension — national park and coastal constraints, plus strong demand, are local factors. A local specialist who knows Portsmouth will factor all of this into your quote and design.

Choosing the right Portsmouth professional

The right match makes all the difference. Tell us about your Portsmouth project and we’ll hand-pick a trusted, insured specialist and introduce you both.

Vetted network

Trusted Portsmouth 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

Portsmouth questions

Home Extensions in Portsmouth — FAQs

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

How much does a home extension cost in Portsmouth?
A typical Portsmouth home extension works out at about £23,000–£80,500 in 2025. South East costs typically run above the UK average — Hampshire labour and materials are a real factor. What you pay depends mainly on single vs double storey and floor area and foundations and structural work, plus 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 Portsmouth?
On site, a home extension in Portsmouth generally runs to 3–6 months. 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 Portsmouth?
It depends on the size and type of project and your property. High property values here mean well-designed extensions and loft conversions often return strong added value. Your matched Portsmouth specialist will tell you exactly what applies and can handle approvals for you.
Is Renomate’s home extensions matching service free in Portsmouth?
Yes — it’s completely free for homeowners in Portsmouth and across Hampshire. 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 Portsmouth?
Every professional we introduce in Portsmouth is vetted for experience, qualifications, insurance and customer feedback. We check the details so you deal only with trusted, proven local specialists.

Start your Portsmouth project

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  • No Hidden Fees
  • Friendly, Expert Support
  • Installers Pay Us, Not You

Nearby

Home Extensions across South East

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Ready when you are

Ready for your home extensions in Portsmouth?

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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