How Much Does a House Extension Cost in Ipswich? A Local Price Guide
If you’re considering a house extension in Ipswich, one of the first questions you’ll ask is how much it’s likely to cost. Extension prices can vary widely depending on the size, design, and complexity of the project, as well as the type of property you own.
In this guide, we explain typical house extension costs in Ipswich, what affects pricing, and how homeowners can budget confidently before starting a build.
Average House Extension Costs in Ipswich
As a general guide, extension build costs in Ipswich typically fall within the following ranges:
- Single-storey extension: £1,800 – £2,500 per m²
- Two-storey extension: £2,000 – £2,800 per m²
- Complex or bespoke extensions: £2,500 – £3,200+ per m²
These figures usually cover core construction costs and may not include design fees, planning applications, or internal finishes.
Cost by Extension Type
Single-Storey Extensions
Single-storey extensions are one of the most popular choices for Ipswich homeowners, often used to create larger kitchens or open-plan living spaces.
Typical cost:
£35,000 – £65,000+
They are generally quicker to build and involve less structural complexity than multi-storey extensions.
Two-Storey Extensions
Two-storey extensions allow you to add space across both floors, making them ideal for growing families.
Typical cost:
£60,000 – £100,000+
Although more expensive overall, the cost per square metre can offer good value when creating multiple rooms.
Side Return & Wraparound Extensions
Side return and wraparound extensions are common in period and terraced homes where internal space is limited.
Typical cost:
£45,000 – £85,000+
These projects often involve additional structural work, which can affect pricing.
What Affects the Cost of a House Extension?
Several factors influence extension costs in Ipswich:
Size & Design
Larger extensions cost more, while features such as roof lanterns, bi-fold doors, or bespoke glazing can increase the budget.
Property Type & Condition
Older properties may require extra groundwork, structural reinforcement, or remedial work before building begins.
Planning & Building Regulations
Planning permission, building control fees, and structural engineer calculations should be factored into the overall cost.
Internal Finishes
Kitchens, bathrooms, flooring, and custom joinery can significantly affect the final price beyond basic build costs.
Additional Costs to Budget For
Homeowners should also allow for:
- Architectural drawings
- Planning application fees
- Electrical and plumbing upgrades
- Heating modifications
- Redecoration of existing areas
A contingency of 10–15% is recommended to cover unexpected costs.
Do You Need Planning Permission in Ipswich?
Some house extensions in Ipswich will fall under permitted development, while others require planning permission. Properties in conservation areas or with previous extensions may face additional restrictions.
Getting advice early helps avoid delays and unexpected changes later in the process.
How Long Does a House Extension Take?
Typical build times are:
- Single-storey extension: 10–14 weeks
- Two-storey extension: 14–20 weeks
This does not include design and planning stages, which can add several months before construction begins.
Is a House Extension Worth the Cost?
For many Ipswich homeowners, extending is more cost-effective than moving. A well-designed extension can improve everyday living while adding long-term value to the property.
Beyond financial benefits, extensions allow families to stay in an area they enjoy while adapting their home to changing needs.
Getting an Accurate Extension Quote
To receive an accurate quote, builders usually need:
- Detailed plans or drawings
- Access to the property
- Clear information on finishes
- Understanding of structural requirements
Clear briefs lead to more accurate pricing and smoother projects.
Final Thoughts on House Extension Costs in Ipswich
House extension costs in Ipswich vary depending on design, size, and complexity, but understanding typical price ranges makes planning far easier. With the right preparation and professional advice from a local builder, an extension can be a valuable long-term investment that transforms how your home works.