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Extension & Conversion Architectural designers

looking for an extension architectural designer?
We offer home extension design services for property owners in corwall

We guide you through the entire extension process, from initial plans, to permissions and consents, through construction to interior design if required, and will always provide a binding quotation before construction begins, to allow financial peace of mind.

We can provide high-quality architectural drawings and 3D designs for all manner of extensions, with an option to provide construction services if required.

Upon completion, all building work will need to be inspected by a Local Council inspector, whilst we will provide the relevant gas and electricity safety certification. Throughout the process we ensure all work conforms to current regulations and matches or exceeds your expectations.

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home extension & conversion design cornwall

If you are planning an extension or conversion for your home, TDS can help you with the planning and design right through to the construction phase of your project.

Whether you need architectural drawings for a new extension or need advice on planning laws in Cornwall, we work closely with you to help make your property improvement dreams a reality.

Finding the best architectural technician in Cornwall for your extension or conversion can be difficult, which is why we are up-to-date with all the latest planning and building regulations and understand the particular demands of planning an extension or conversion in Cornwall.

We also have a network of trusted local construction suppliers in Cornwall so can help you with the build phase of your construction project.

Our services include architectural drawings and submitting planning regulations for conversion and extension projects in Cornwall including:

  • Loft (dormer) conversions
  • Barn conversions
  • Attic conversions
  • Kitchen extensions
  • Mill conversions
  • Garage conversions
  • Rear home extensions
  • Second or multi-storey extensions
  • Wrap around home extensions
  • Kitchen extensions
  • Outbuildings, garages and conservatories


Based near Falmouth, we work as extension and conversion architectural designers across Cornwall including Truro, Newquay and St Austell.

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"Rob was always professional and went above and beyond when helping us design our dream home. He was very responsive and offered ideas and advice over all aspects of a house build, from planning permission to finishing touches. Rob’s final drawings are easy to work from and exceeded our expectations. We highly recommend him."

- Gary on Bark.com

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We specialise in all types of Architectural Design

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