How Much Does a Home Extension Cost in Havant? 2025 Local Pricing Guide
A home extension is one of the most popular ways to add space and value to properties across Havant, Bedhampton, Emsworth, Hayling Island and Waterlooville. With rising house prices and limited availability of larger homes, many homeowners are choosing to extend rather than move.
If you’re planning a building project in 2025, understanding local extension costs in Havant will help you budget accurately and avoid unexpected expenses. This guide breaks down typical prices, what affects the final cost, and what you should consider before starting work.
Typical Home Extension Costs in Havant (2025)
Extension costs vary depending on size, design, materials and structural complexity. Below are average price ranges for Havant and the surrounding areas.
Single-Storey Extension
£1,800 – £2,500 per m²
Single-storey extensions are ideal for:
- Kitchen extensions
- Dining or family rooms
- Open-plan living spaces
They are especially popular in Bedhampton and Emsworth, where garden space allows for rear extensions.
Double-Storey Extension
£2,200 – £3,200 per m²
A double-storey extension offers excellent value by increasing space on both floors.
Common uses include:
- Additional bedrooms
- Extra bathrooms
- Larger kitchens below
These are often seen in family homes across Havant town centre and Waterlooville.
Side or Rear Extensions
£30,000 – £60,000+
Costs depend on:
- Size of the extension
- Structural work required
- Access and groundwork
These extensions are common where side access or wider plots are available.
Wrap-Around Extensions
£55,000 – £95,000+
Wrap-around extensions combine rear and side extensions to create a major transformation of the ground floor. They’re ideal for open-plan kitchen-living spaces and are increasingly popular in Havant’s larger properties.
What Affects the Cost of a Home Extension in Havant?
1. Property Type
Havant has a mix of:
- Victorian and Edwardian homes
- 1930s semis
- Modern estates
Older properties may require additional structural work, insulation upgrades or foundation improvements.
2. Design & Materials
High-end finishes increase costs, including:
- Bifold or sliding doors
- Roof lanterns and skylights
- Bespoke kitchens
- Underfloor heating
The more bespoke the design, the higher the final cost.
3. Ground Conditions
Some areas around Hayling Island and coastal zones may require deeper foundations or specialist groundwork, which can affect pricing.
4. Planning Permission & Regulations
While many extensions fall under Permitted Development, planning permission may be required if:
- The extension exceeds size limits
- The property is in a conservation area
- It’s a double-storey extension
- The design significantly alters the appearance of the home
Building Regulations approval is always required, regardless of planning permission.
5. Size & Complexity
Larger extensions with structural steel (RSJs), plumbing reconfiguration or complex roofing will naturally cost more and take longer to complete.
Do You Need Planning Permission for an Extension in Havant?
Many Havant homeowners are surprised to learn that planning permission is not always required.
Under Permitted Development rules, you may be able to extend:
- Up to 3–4 metres for terraced or semi-detached homes
- Up to 8 metres for detached homes (subject to rules)
However, restrictions apply, so it’s always best to check before starting.
How Long Does a Home Extension Take to Build?
Typical build times include:
- Small single-storey extension: 8–12 weeks
- Medium extension: 12–18 weeks
- Large or double-storey extension: 16–24+ weeks
Planning, architectural drawings and approvals should be factored in before construction begins.
Why Extensions Are So Popular in Havant
Home extensions continue to rise in popularity across Havant because they offer:
- More living space without moving
- Increased property value
- Modern layouts for family living
- Better use of outdoor space
- Long-term investment potential
With strong transport links and desirable neighbourhoods, many families prefer to stay local and improve their existing homes.
Final Thoughts
A home extension is a major investment, but when done correctly it can transform your property and significantly increase its value. Understanding local extension costs in Havant helps you plan realistically and make informed decisions.
Working with an experienced local builder ensures your extension is completed safely, efficiently and in line with current building regulations.