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Kitchen Extension Design Specialists in Hampshire
Transform your home with a beautifully designed kitchen extension. From planning drawings to building regulations, we handle every aspect of the design process so you can focus on choosing your dream kitchen.
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Types of Kitchen Extension
Every home is different. We design kitchen extensions to suit your property, budget, and lifestyle.
Single-Storey Rear Extension
The most popular option. Extends your kitchen straight out into the garden, creating a larger open-plan kitchen-diner with direct garden access.
Wrap-Around Extension
Combines a rear and side extension into an L-shape, maximising floor space and creating a truly open-plan living area.
Side Return Extension
Perfect for Victorian and Edwardian terraces. Fills in the narrow alleyway alongside the kitchen to widen the room significantly.
Full-Width Rear Extension
Spans the entire width of the property at the rear, creating a dramatic open-plan kitchen-living space with panoramic garden views.
Planning Permission & Building Regulations
Understanding the rules before you start saves time and money. We guide you through every requirement.
Permitted Development Rights
Many single-storey rear extensions can be built without planning permission under PD rights. Limits depend on property type: up to 6m for detached houses, 4m for semi-detached or terraced.
Planning Permission
Required for wrap-around extensions, extensions beyond PD limits, properties in conservation areas, or listed buildings. We handle the full planning application process.
Building Regulations
All kitchen extensions require building regulations approval regardless of planning status. Covers structural integrity, foundations, drainage, ventilation, and energy efficiency.
Party Wall Notices
If your extension is within 3 metres of a neighbour's boundary or affects a shared wall, you'll need to serve party wall notices under the Party Wall Act 1996.
Not sure what applies to your project? Book a free feasibility assessment and we'll check your Permitted Development rights and advise on the best route for your kitchen extension.
Kitchen Extension Costs Guide
Build costs vary depending on size, specification, and location. These are typical ranges for Hampshire in 2025.
Small Single-Storey Rear
10–15m²
£25,000 – £45,000
Medium Rear Extension
15–25m²
£40,000 – £70,000
Large Rear / Wrap-Around
25–40m²
£60,000 – £100,000
Full-Width / Premium
30–50m²
£80,000 – £150,000+
Why Choose Hampshire Build?
98% Planning Success
Across all applications
Fast Turnaround
Drawings in 3–4 weeks
Full Service
Planning to building regs
Local Expertise
Hampshire council knowledge
Frequently Asked Questions
A kitchen extension in Hampshire typically costs £30,000–£80,000 to build, depending on size and specification. Our design packages start from £1,350+VAT for planning drawings. Use our Extension Cost Calculator for a personalised estimate based on your specific requirements.
Many single-storey kitchen extensions qualify under Permitted Development rights — up to 6m for detached houses or 4m for semi-detached and terraced homes. Larger or wrap-around extensions usually require planning permission. We assess this during your complimentary consultation.
Design and planning typically takes 8–12 weeks. The build phase usually takes 10–16 weeks depending on complexity. A single-storey rear extension is generally quicker than a wrap-around or full-width design. We provide clear timelines at every stage.
The best type depends on your property layout and budget. Single-storey rear extensions suit most homes. Wrap-around extensions maximise space on corner plots. Side-return extensions work well for Victorian terraces. We recommend the right approach during your feasibility assessment.
Yes. Hampshire Build provides complete extension design services as specialist extension designers. We produce all planning drawings and building regulations documents at fixed fees, typically saving families £2,000+ compared to traditional architect percentage-based charges.
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Ready to Design Your Kitchen Extension?
Book a free feasibility assessment. We'll visit your property, discuss your vision, and advise on the best approach for your kitchen extension.