2 Storey Rear Extension Plans: Maximize Space & Boost Your Home's Value

Published by Park February 21, 2026

Transform your living space with a stunning 2 storey rear extension. Discover how adding an extra level to your home can create the perfect blend of modern design and functional living, all while increasing your property's value.

2-Storey Rear Extension – Daintree Design

2-Storey Rear Extension – Daintree Design

Source: www.daintreedesign.co.uk

Designing Your Dream 2 Storey Rear Extension

When planning a 2 storey rear extension, consider the architectural style of your home. A contemporary design with large windows and open-plan living can create a seamless flow between old and new. Prioritize natural light by incorporating skylights or a glass atrium. Also, think about how the extension will integrate with your garden and existing exterior. Consult with an architect to ensure the design complements your property's character while meeting your needs.

Double Storey Extension Plans | Plans From £195 | Low Cost Architect

Double Storey Extension Plans | Plans From £195 | Low Cost Architect

Source: www.extension-design-plans.co.uk

Navigating Planning Permissions & Building Regulations

Obtaining planning permission for a 2 storey rear extension can be complex. In the UK, most rear extensions under 3 meters in height may not require planning permission under permitted development rights, but this depends on your property's location and type. However, building regulations must always be met to ensure safety and structural integrity. Key considerations include fire safety, insulation, and ventilation. Engaging a qualified building control surveyor early in the process can prevent costly delays.

2-Storey Rear Extension – Daintree Design

2-Storey Rear Extension – Daintree Design

Source: www.daintreedesign.co.uk

Budgeting & Cost Considerations

A 2 storey rear extension is a significant investment. Costs typically range from £2,500 to £4,500 per square meter, depending on materials and complexity. Factors affecting the budget include the size of the extension, the quality of finishes, and any structural work required. It's essential to get multiple quotes and factor in contingency costs. Remember, while the upfront cost is high, a well-executed extension can add up to 20% to your home's value.

Double Storey Rear Extension in Islington | Extension Architecture

Double Storey Rear Extension in Islington | Extension Architecture

Source: extensionarchitecture.co.uk

Ready to transform your home? Consult with a reputable architect and builder to bring your 2 storey rear extension plans to life. Contact us today for a free initial consultation and start planning your dream space.

Modern double storey rear extension | House extension plans, Flat roof ...

Modern double storey rear extension | House extension plans, Flat roof ...

Source: www.pinterest.co.uk

Double/Two Storey Rear Extension Plan – London, Birmingham, Glos ...

Double/Two Storey Rear Extension Plan – London, Birmingham, Glos ...

Source: www.agrarian-uk.com

3D Visuals - Extension Plans UK

3D Visuals - Extension Plans UK

Source: extensionplansuk.co.uk

At a glance

At a glance

Source: resi.co.uk

Two storey side extension | Plans For Property

Two storey side extension | Plans For Property

Source: www.plansforproperty.co.uk

TWO STOREY REAR EXTENSION – GENDROS, SWANSEA - SeaGrey Design Limited

TWO STOREY REAR EXTENSION – GENDROS, SWANSEA - SeaGrey Design Limited

Source: seagreydesign.co.uk