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Transform your home with a beautifully designed kitchen extension. We prepare planning drawings and building regulation drawings for Building Notice submission, with required structural calculations by an independent qualified structural engineer.
The heart of the home
Start with a kitchen extension designed around everyday family life.
Every home is different. We design kitchen extensions to suit your property, budget, and lifestyle.
The most popular option. Extends your kitchen straight out into the garden, creating a larger open-plan kitchen-diner with direct garden access.
Combines a rear and side extension into an L-shape, maximising floor space and creating a truly open-plan living area.
Perfect for Victorian and Edwardian terraces. Fills in the narrow alleyway alongside the kitchen to widen the room significantly.
Spans the entire width of the property at the rear, creating a dramatic open-plan kitchen-living space with panoramic garden views.
Understanding the rules before you start saves time and money. We guide you through every requirement.
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.
Required for wrap-around extensions, extensions beyond PD limits, properties in conservation areas, or listed buildings. We handle the full planning application process.
All kitchen extensions require building regulations approval regardless of planning status. Covers structural integrity, foundations, drainage, ventilation, and energy efficiency.
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 complimentary feasibility assessment and we'll check your Permitted Development rights and advise on the best route for your kitchen extension.
Build costs vary depending on size, specification, and location. These are typical ranges for Hampshire in 2025.
10–15m²
Obtain a written contractor quotation
15–25m²
Obtain a written contractor quotation
25–40m²
Obtain a written contractor quotation
30–50m²
Obtain a written contractor quotation
Your survey and drawing schedule will be agreed with you after instruction.
Planning drawings and Building Notice drawings
Our packages are Pre-Build £1,950 + VAT, Premium £2,950 + VAT and Premium Plus £3,950 + VAT. Compare the packages page for scope. Building work and statutory fees are separate; obtain a written contractor quotation for your particular layout, structure and specification.
Some single-storey rear extensions qualify for permitted development if all relevant limits and conditions are met. Larger rear extensions may need the prior-approval process. Check the property's planning history, designation and any Article 4 Direction before choosing an application route.
Your measured survey is booked within 10 working days of your deposit. Your first drawings follow within 15 working days of the survey. Council decisions and construction are separate; the council and your appointed contractor determine their own schedules.
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.
Hampshire Build provides architectural design through clearly scoped fixed-fee packages. Structural calculations are prepared by an independent qualified structural engineer. Check the current packages for included documents, submissions and exclusions.
Book a complimentary feasibility assessment. We'll visit your property, discuss your vision, and advise on the best approach for your kitchen extension.
For Victorian and Edwardian terraces in areas such as Shirley, Bitterne and Portswood, compare a rear kitchen-diner with a side-return layout where the plot allows. Test circulation, garden access, daylight and storage before selecting glazing. Southampton City Council's planning requirements and the property's permitted development rights must be checked for the actual proposal. Explore extension design in Southampton.