New! Fixed priced House Extension Quotations Within Minutes

Granny Annexes | Garden Annexe

Granny Annexes / Garden Annexes

Granny Annexes Custom Built
To Your Specifications

A Complete Turn Key Service – Constructing:
*Homes for elderly Parents
*Homes for your Children / Young Adults
*Homes for family members & relatives

The Cost effective alternative to buying a property

Our Annexes are essentially self contained ‘smaller houses and homes’
classed as an annexe under planning laws. You can choose to have your
annexe constructed in either block work or construction grade timber frame
granny annexes by advanced new builds

It’s a Family House on Your Land

Granny Annexes & Garden Annexes

Garden Annexes / Granny Annexes have become increasingly popular with home owners across the country. Annexes are a great cost effective choice not only to keep elderly parents close by, but also for young adults and young families struggling to get onto the property ladder.

All the Granny and Garden Annexes we build are permanent buildings which comply with building regulations and will also add value to your property along with providing that independent living accommodation, family members can call home.

When it comes to size shape and layout, we have produced a number of designs clients can either choose from, alter or draw inspiration from. Sitting down with one of our building designers will give you the opportunity to design the perfect annexe which Advanced will custom build for you.

Our Annexes are essentially ‘smaller houses and homes’ classed as an annexe under planning laws. You can choose to have your annexe constructed in either block work or construction grade timber frame. The finish can be brickwork, render, tile, cladding or even stone work to match your existing building, blend in with your garden or become a stand out show piece.

The service we offer is a complete turn key service, from idea to handing over the keys to your new annexe property. Every project has a dedicated project manger who will oversee, organise and manage the entire project from start to finish. Access to your dedicated project manager is available to clients 7 days a week from 8am to 7pm everyday whilst a project is in action.

Our buildings will require building control and so will any building that plans to be slept in or holds sleeping accommodation. We handle the entire building control process for all our clients as part of our service.

We Handle Everything:

  • Complete Design & Build
  • Gaining Planning Permission
  • Building Regulations Approval

A Process Made Easy:

  • Choose a Construction Type & Finish
  • Select a Design & Size
  • Pick Your Interior Finishes
  • Check a Payment Plan
  • Book To Have Yours Constructed

A Turn Key Service:

  • Design / Planning / Build
  • Fixed Priced Stage Payments
  • 10 Year Build Warranty As Standard
  • After Sales Support


A Brief Overview Of The Process ~ Design, Planning , Construction

Select a Size & Layout

We have a range of professionally designed sizes and layout options available to choose from, including the option to have an input in altering layouts and building sizes to suit your particular requirements.

Granny Annexes in Kent


Choose From Either Block or Timber Frame Construction

All our Granny Annexes / Garden Annexes are constructed onsite by our own skilled craftspeople resulting in a better build quality, stronger walls and warmer living space. This level of precision, attention to detail and craftsmanship along with the use of carefully selected, high quality building materials is what sets our buildings apart from factory produced wall panel buildings.

Blockwork Walls

Option To Choose Blockwork Construction

Timber Frame Walls

Option To Choose Timber Construction


Choose your exterior finish

Our Granny Annexes & Garden Homes accommodate any external Finishes to match your existing property or blend in with your garden, such as:

BrickworkBrickwork finish for home extensions
StoneStone wall finish for home extensions
Waterproof Coloured RenderWaterproof Coloured Render Finish For Home Extensions

Sand and Cement RenderSand and Cement Render Finish For Home Extensions
Tile HungTile Hung Finish For Home Extensions
Timber & Wood CladdingTimber & Wood Cladding Finish For Home Extensions


Choose Windows Doors & Internal Finishes

We’ve brought together a range of products to choose from including windows & doors, kitchens, bathroom suites and flooring.

Choose Windows & Doors

Windows and doors

Decide on a Kitchen

Granny Annexe Kitchen

Select a Bathroom

Granny Annexe Bathroom

Pick your Flooring

Select a Carpet


Planning Permission

We handle everything including gaining the relevant planning approval or certificate of lawful development making sure your new granny annexe / home building meets your local councils planning laws. This process can take up-to 4 months if pre-application advice is first sort. It’s that very reason we recommend clients get in touch and start the ball rolling as early as possible.


Once Planning Permission is Approved… it’s Time to build

start to build

The Start Of Your Annexe

granny annexes by advanced new builds

Your Building’s completed in 6 to 8 weeks


Building Regulations

We’ll also take care of building regulations approval, inspections and completion certificate so you can rest assure that your new building complies with the latest building regulations, meets all safety requirements and doesn’t affect any future sale of your house.


Now You’re Ready To Move In…


Costs – is a granny annexe / garden annexe a good investment?

Our Granny Annexes & Garden Annexes are excellent value for money, annexes with a 28m2 footprint start from only £84,000 plus planning costs – completed and ready to move into. The average price for a new one bedroom apartment in the southeast is currently £210,000 or a £1050 monthly rental. In this example an annexe as an alternative would save at least £126,000. Compared to a one bedroom bungalow, the savings are even greater.

By also taking into account legal fees, property valuations, mortgage applications and other costs associated with purchasing a property it’s clear to see why annexes have become the sensible option for 2024.

Will an annexe increase my house value?

Yes it will add value to your house. By Constructing an annexe, not only will you increase the value of your property, you will also make it more attractive to potential buyers in the future especially to those families with teenage children, adult children and large families.

All in all… in monetary terms, annexes are a great investment that make sense financially. Upon survey of your property, area and details of your annexe, we’ll be able to give you a more thorough indication and numbers of how investing in an annexe will positively increase your particular house value.


 If you are planning a granny / garden annexe then we would love to hear from you…

Call us today for a friendly chat and more information on 0843 289 2932 or request a call back using our contact page