Bespoke Granny
Annexe Builders

The Ultimate Design & Build Service

  • Expert Craftmanship
  • No Planning Permission
  • Competitive Quote Guaranteed
  • Eco Friendly Options

Specialist annexe builders

Green annexe specialise in creating bespoke, self-contained living spaces for your loved ones on your property. With a focus on comfort, accessibility, and privacy, our Expert team designs granny annexes that cater to your family's unique needs.

We understand that every home deserves a touch of distinction, a space that seamlessly Blends with its surroundings while providing the extra room you desire. Whether you're Looking for a 1 or 2 bedroom annexe with utilities or just a simple office, lounge or gym, We can make your dream a reality

Our annexes are crafted with meticulous attention to detail, ensuring that each Structure compliments your unique preferences and enhances charm of your garden Or property. Prepare to re-imagine your world. Prepare to embrace boundless Opportunities.

London - Essex - Kent - Hertfordshire - Surrey - Buckinghamshire - Bedfordshire - Berkshire

Our process




Get in touch today via our website or over the phone to make a start on the process.




We will visit site free of charge to undertake a full survey on your requirements.




We will then be able to provide you with a full quote of works including drawings and planning applications.




Once all agreed we will commence the manufacturing stage and start on site within 2 weeks.


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Why Choose Us?

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No Planning Required

Our work typically only requires a Certificate Of Lawful Development.

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Within Budget

We offer guaranteed competitive quotes in order to stay within your budget.

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Finance Options

Our finance partners are on hand to offer you any type of finance you need to fund your annexe build.

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Swift Installation

We can complete annexes in up to 2 weeks in some cases.


Cavendish Capital


Our Finance Partners

Green Annexe are pleased to announce a finance partnership with the highly established Cavendish Capital.

This enables us to offer all of our clients a great option to raise capital for the development of their annexe.

With over 30 years experience within the finance industry Cavendish Capital are one of the UK's most prestigious and trusted providers of all finance options.

With offices in Hertfordshire and Mayfair, Cavendish Capital have successfully funded over £1,000,000,000 to date.

Funding Areas

  • Residential Mortgages
  • Buy To Let Mortgages
  • Commercial Mortgages
  • 2nd Charge Mortgages
  • Bridging Loans
  • Unsecured Loans
  • Asset Finance



Our Planning Partners

Green Annexe are proud partners with one of the UK's most reputable planning specialists.

NAPC are a specialist consultancy with a wealth of experience in annexes, mobile homes, and garden rooms. Working with both private and commercial customers, their nationwide service provides a complete range of planning, drawings, and building control services.

NAPC is here to offer advice on all aspects of building governance. So you can be sure your project meets all the legal and technical requirements demanded by planning law.

Planning Areas

  • Project Feasibility
  • Planning Application
  • Lawful Development Certificate
  • Planning Appeals
  • Enforcement
  • The Caravan Act


Are granny annexes suitable for year-round living?

Yes, absolutely! Our granny annexes are built to the highest standards, ensuring they are fully insulated and equipped with modern heating and cooling systems. This makes them suitable for year-round living, providing a comfortable and cozy environment for your loved ones regardless of the season.

Will I need planning permission to build a granny annexe?

The need for planning permission varies based on the location and specific regulations of your area. In many cases, granny annexes fall under permitted development rights, allowing them to be built without planning permission. However, it is essential to consult with our experienced team, who can guide you through the planning process and ensure compliance with local regulations.

Can you customize the granny annexe to accommodate specific mobility needs?

Yes, definitely! Our granny annexes are designed with flexibility in mind, and we can tailor the space to accommodate specific mobility needs. Whether it is adding ramps, wider doorways, or accessible bathrooms, our expert team will ensure the annexe is adapted to support the comfort and independence of your loved ones.

How long does it typically take to build a granny annexe?

The construction timeline for a granny annexe can vary depending on several factors, such as the size of the annexe, complexity of the design, weather conditions, and any necessary planning processes. On average, the construction process takes around 5 to 8 weeks. However, our team is committed to delivering projects efficiently without compromising on quality, ensuring your granny annexe is ready for use as soon as possible.

How energy-efficient are your granny annexes?

Our granny annexes are constructed with energy efficiency in mind. We use high-quality materials and modern insulation techniques to ensure the annexes are well-insulated, reducing energy consumption and lowering utility costs. Additionally, we offer eco-friendly options and can incorporate sustainable features upon request.

Speak to our team today!

We're on hand to offer free advice & quotations

0203 633 1075

Fast Response Time

House Green Annexe

London - Essex - Kent - Hertfordshire - Surrey - Buckinghamshire - Bedfordshire - Berkshire

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