Looking for a quality and competitive construction company for you next project?


About Us

Here at Astrum Construction we provide a wide range of building and maintenance services. From garage conversions and extensions to barn conversions, conservation and restoration work, to list just a few. We can assist with the whole construction process from planning, approval & design of your project, right down to finer details that make your house a home such as lighting controls and smart home solutions.

With over twenty years’ experience we pride ourselves on our professional, personal and quality service. We can make your house the home you dreamed of, make your garage and loft the extra space you always wanted.  We can build you your bespoke new house from start to finish or, with our more specialised area, restore and refurbish your period property. We can convert your old tired barn into an extension, or home, keeping the traditional look or putting a more modern twist on it. Depending on your vision for the property, we can create a beautiful space to live in with high ceilings and large rooms. Alternatively, if you require more bedrooms for a growing family, we can create a separate living space through a barn loft conversion.



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At Astrum we hold a wealth of experience in understanding all the planning conditions and constraints involved in the construction of barn conversions. We can assist with the whole construction process from planning & approval of your conversion and design right down to lighting controls and smart home solutions.

The positive of converting existing barn buildings is that they, like new builds, are largely exempt from VAT, which you are currently able to reclaim via HMRC Notice 431C. Also, the strict planning constraints involved in the building of new dwellings in the Countryside are timely and expensive to overcome. Recent changes in planning ‘Permitted Development (PD) rights introduced in early April 2014 have transformed the landscape for anyone wishing to undertake a barn conversion in England (not applicable to the rest of the United Kingdom as it currently stands).

Barn conversions are the perfect build for those wishing to embrace original design features and character while utilising living space. The beauty of a barn conversion is that they allow for generous room proportions and high ceilings.


At Astrum one of the elements of construction that we specialise in is building/extending homes with natural stone, not just because of its inherent characteristics of quality and durability but also due to the fact that it lends itself perfectly to landscapes of rural locations.

Natural stone is a sustainable building material, the process of extracting natural stone from local quarries or reclaimed from nearby demolished buildings is far more ecological that the processes used to create standard building bricks.

Natural stone is:

  • Highly durable
  • Low maintenance
  • Versatile
  • Comes in many shapes and sizes
  • Retains thermal mass

We can work with you to create the perfect home from the planning stages through to interior design and smart home solutions. We can assist with the design, and work through complications that may arise to ensure you get the exact home you have always dreamed of. We can also provide labour only teams to larger construction projects if required.

We are constantly updating our skills & knowledge of the building industry, we use sustainable materials wherever possible lessening impact on the environment & making your home as energy efficient as possible. We also work with the latest technology in smart home solutions, lighting controls, and security systems.


Here at Astrum Construction we can create the extra space you need with a garage or loft conversion.

Garages and lofts are an ideal area to convert for that much-needed living space.

Astrum Construction can turn your garage or loft into an extra bedroom, bathroom, kitchen or living area. Whichever you choose we will ensure it is a space you will love.


Do you want a bigger kitchen? Want a new bedroom? Let Astrum Construction help you by building an extension. Extensions give you extra space and can add immense value to your property. You can have the extension built exactly how you want. We like to take time to listen to our customers, their ideas and expectations and can offer our expert advice and recommendations.

Our unique approach is based entirely around your needs. You can choose our team to project manage the whole process, from the initial design of your project, through to the build and completion, right down to the last coat of paint. Or you can choose the services which suit you.  The simple staged process enables you to make informed decisions every step of the way.

By working with us, you can be confident that we’ll find the best solution for you and your family, creating the living space you need to suit your lifestyle, and of course, your budget.


At Astrum Construction we are at the forefront of the refurbishment and restoration industry. We offer all our customers a unique building and refurbishment service which combines with our knowledge of traditional building techniques with modern methods.

Whether you have a traditional building in need of a full refurbishment or a more contemporary building which needs internal refurbishment, Astrum Construction have the expertise for the job.


Along with our domestic building services we also offer a wide range of commercial refurbishments including fit out services creating the perfect working environment for your customers, clients and employees.

We can transform your existing building to an open plan working system or install partition walling to separate office spaces if required.

Works that we have undertaken include office fit-out, restaurant extensions, barn conversions to office space and more. We will undertake the whole project from planning to completion, inclusive of all areas from wash rooms to parking areas. You can trust that Astrum will provide you with the perfect environment for your growing business.

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Recent Projects

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Tathall End – Single Storey Extension

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Buckingham Barn Conversion

Astrum Construction Cranfield Road New Build 2

Cranfield Road New Build

New Build Bourne End | Astrum Construction

Bourne End – New Build

Green Valley Farm, Cranfield Road
Astwood, Buckinghamshire MK16 9JU

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