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addition property design

design your extension with us

addition property design provides a unique building design service. We specialise in extensions, building remodeling and new builds across Warwickshire, Northamptonshire, London, and Surrey.


- Free onsite consultation to discuss your vision and needs

- Understand your budget

- Work together to bring your ideas to fruition

- Full fixed price quotation within 24 hours of initial consultation.


Upon acceptance of quotation:

- Full site survey

- Initial site drawing pack (Pre and Proposed plans)

- Design Review

- Drawing Revisions (as req.)

- Structural Calculations (as req.)

- Final Design Review

- Submission to Planning Portal


- Building Regulations drawing pack:

- Cross-sectional drawings

- Insulation requirements

- Drainage details

- Fire safety strategy

- Design Review with Building Inspector


- Builder Introduction (as req.)

- Planning and project management to meet your needs

- Ensure a smooth transition from planning through to build completion

About Us

Our design and planning business was formed from a love of building design and a passion for transforming spaces for our customers to enjoy, that will make their lives better or add value to their property.

We design with you in mind and have first hand experience of the full planning process. We work closely with you to tailor the design to your needs and give you the best addition to your property.
Whether it's a kitchen extension, loft conversion, garage conversion, internal wall removal, garden room or home office give us a call to see what we can do to support you.

Recent Projects

Explore Our Work


Victorian Cottage Extension

Nov 2019 to Sept 2021

This Victorian Cottage needed to be brought into the 21st Century with an innovative reconfiguration to the first floor layout incorporating an upstairs shower room. The re-positioning of the rear family bathroom and extending of the small galley style kitchen makes better use of the external spaces of the property and enhances the stunning walled garden features. The removal of the lean-to utility room and services added to the existing summerhouse increase the outside space whilst the bi-folding doors of the extension blur the lines between house to garden.

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