We specialise in planning application and building regulation drawings.

But that’s not all our team of top experts are here to take you through every stage of your extension journey. At Diamond Extension Architecture we offer:

  • A free initial on-site consultation.
  • Building and planning regulation drawings.
  • Submission of your application to the local council.
  • A regulation standard construction team.
  • Project management.
  • A mortgage brokerage, so you can sit back and watch your property rise in value!

Our Services

Our Price & Case Study

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More About Us

Diamond Extension Architecture is an architectural planning practice that goes the extra mile. We can supply that dream extension you’ve always wanted and help you pay for it too. At Diamond Extension Architects we have every part of the process perfected, working with top architects and building consultants to bring you building and planning regulation approved drawings. We work with an independent mortgage broker that have been established since 1986, so we can easily help re-mortgage your home with the overall goal of helping your property value rise!
• Site visit and consultation, where we assess all your planning permission needs.
• Planning and building application drawings.
• Application for planning permission to local council.
• An experienced team of top architects and builders.
• Mortgage brokers-so you can sit back and watch your property rise in value!
Our efficient, on hand building team will take you through every step on the journey. Ensuring high quality standards are delivered on time.


We specialise in planning application and building regulation drawingsWe specialise in planning application and building regulation drawingsWe specialise in planning application and building regulation drawings
Robert Downy Jr., Google.com

Mortgage Services.

At Diamond Extension Architects we work with top Mortgage brokers that have been extending homes and increasing property values since 1986. We know home extension can be expensive that’s why we work independently from commercial banks to access a larger market of lenders and offer you the best deal possible for you and your home.

Learn about Planning Permission and Application in London Boroughs

London Councils Planning Permission Merton Planning Permission Richmond Planning Permission Kingston Planning Permission Surrey Planning Permission
Hounslow Planning Permission Sutton Planning Permission Spelthorne Planning Permission Woking Planning Permission Guildford Planning Permission
Kensington and Chelsea Planning Permission Redbridge Planning Permission Islington Planning Permission Bexley Planning Permission Brent Planning Permission
Croydon Planning Permission Durham Planning Permission Ealing Planning Permission Enfield Planning Permission Hackney Planning Permission
Harrow Planning Permission Havering Planning Permission Lambeth Planning Permission Hillingdon Planning Permission Lewisham Planning Permission
Newham Planning Permission Greenwich Planning Permission Hammersmith & Fulham Planning Permission Epsom & Ewell Planning Permission Mole Valley Planning Permission
Southwark Planning Permission Wandsworth Planning Permission Westminster Planning Permission Walton Parish Planning Permission