Granny Annexes and Home Offices

We understand that the process of considering, buying and building an annexe can be extremely stressful and time consuming. That is why we have tailored our process to take care of everything for you. From design and planning, through to painting the walls, and connecting the water and electrics, we do it all.

We will handle everything for you. All we need is an initial design meeting to understand what you are hoping to achieve from the build, and we will do the rest. Design, Planning Permission, Building regulations and Construction.

Is Covid here to stay?

The COVID-19 pandemic and subsequent lockdowns made many people realise that importance of being close and spending time with their loved ones and having a property that is future proofed should the UK be plunged back into another lockdown.

In many situations, with loved ones living far away it has meant families did not have the opportunity to see their close family members for long periods of time, leaving them isolated and in some cases at risk to the virus through no fault of their own.

One solution could be a self-contained "Granny Flat" or annexe. It offers them their own space, luxury and helps them retain independence for loved ones who require extra care during these times. 

An annexe does not only offer a haven for your family but will work out financially beneficial in the long term.

For example, suggests the average weekly residential care cost is around £681 per week for England.

That's £35,412 per year.

Would this cost not be better spent invested in your existing asset? At the same time this would provide you with the opportunity to look after your loved ones, keep them out of harms way and allow you to sleep easy at night, knowing that they are not far away and not 'locked down' during the twilight of their life.

Neptune Construction can offer you a way forward, all you have to do is give us a call.


What to expect

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Initial Meeting and Design Phase

We are a design and build company and will take responsibility for the entire project, start to finish. We use 3D modelling software and animation to prepare your unique design to your specification.

We can include accurately sized people and furniture to give a sense of scale and kitchen layouts to assist in you better understanding what the design will achieve. Just let us know what you are after and we will do the rest.

Planning Permission and Building Regulations

Granny Annexes automatically require planning permission. In the case of home office buildings, sometimes depending on the circumstances these buildings do not require permission. In all cases however, construction of this type requires Building Regulations. We will handle all aspects of securing the legal permissions for the build which are always important if you ever come to sell the property  



From the foundations and drainage, damp proofing, walling and insulation, electric, heating and roofing we will handle it all. We have the experience and contacts to get the job done, and at a fair price.

The time scale varies from job to job, but you could see your new build done within as little as 10 weeks, depending on the type of development.


Plastering, Plumbing, Kitchen installations, bathroom design and build, feature lighting, tiling, flooring and painting - we will get the the job done to your specification. This will add value to your home and make the time and effort you spent in progressing the project worthwhile for years to come.


Increased Homeworking

There is nothing quite like spending months cooped up in your home and as to feel like as if your walls are closing in on you. No matter how big your home is it wall always feel small, especially when all the family is home 24/7 breathing down each other necks. With parents and adults working from home and youngsters home schooling, conflict of impact on work efficiency is bound to happen.

With so many more people realising that working from home is not only feasible but better overall, getting a Home Office/Annexe built seems to be the most logical way forward. It could offer the escape from the kids that you so desperately need, allowing you to get with your work. It can provide additional bedroom space. It might also provide somewhere to relax, a cinema a room, a table tennis table, a golf simulator... the list goes on.

High speed internet connections, highly thermal efficient buildings, underfloor heating, toilets and showers - you can have it all in your new annexe building. We will work with you to provide a bespoke design and process the planning, building regulations and construction process for you.