
PROFESSIONAL HOUSE EXTENSIONS IN AMPTHILL
Extending a home in Ampthill is often the smartest move a family can make. Moving house in the current market means estate agent fees, stamp duty, removals and the enormous disruption of finding somewhere better. Extending instead means staying in the same school catchment, keeping the garden you've worked on for years, and ending up with a home that actually fits the way you live. At Astrum Construction, we design and build house extensions across Ampthill and the surrounding villages, from compact rear extensions through to two-storey side returns that transform a property.


Design that fits the property
A good house extension design starts with the property itself. In Ampthill, that might mean matching Flemish bond brickwork on a Victorian terrace, picking up the window proportions of a Georgian frontage, or finding a way to add significant space to a modern home without making it look bolted on. We work with architects on the drawings where a formal design is needed. Then, we'll tell you early on what planning is likely to say and where the design choices are that actually matter.

The types of extensions we build
We handle every standard extension type: single-storey rear extensions with large glazed rear elevations, side returns that open up terraced kitchens, two-storey extensions that add bedrooms as well as living space, wrap-arounds, oak-beamed orangeries, and garden rooms. We also do loft conversions and garage conversions where those are the more sensible route. If you're not sure which approach gives the best return for your property, we're happy to talk through the options before you commit to drawings.
Planning, building regulations and the paperwork
A lot of Ampthill extensions fall inside permitted development, which keeps the planning process straightforward. Others, particularly in the Conservation Area, near listed buildings, or on larger footprints need a full planning application. We handle both, including the building regulations submission and the structural calculations where they're required. If the property is listed, we manage the heritage consent alongside it. You shouldn't need to become a planning expert just to get your house extended, and with us you don't have to.
Frequently Asked Questions
Are you fully insured?
Yes, Astrum Construction carries full public liability insurance on every project we undertake. We are also proud members of the Federation of Master Builders, giving you additional peace of mind that we operate to a recognised code of conduct and high professional standards.
How do I get a quote?
Simply get in touch via our contact page or give us a call and we will arrange a no-obligation visit to discuss your project. We will talk through your ideas, assess the property, and provide a clear, itemised quote with no hidden costs.
How long will my project take?
Timescales vary depending on the size and complexity of the work. A loft conversion typically takes 6–8 weeks, while a full extension can take 3–5 months. We will always give you a realistic programme at the quoting stage and keep you regularly updated throughout the build.
Do you handle planning permission?
We can advise on whether your project requires planning permission and guide you through what is involved. Many extensions and conversions fall under permitted development, but where a full application is needed we can recommend trusted local planning consultants to support you through the process.
How much does a house extension cost in Ampthill?
The cost of a house extension in Ampthill varies depending on the size, specification, and complexity of the build. Once we discuss your project we can provide detailed, itemised quotes so you know exactly what you are paying for before any work begins.
Do I need planning permission for a house extension in Ampthill ?
Many house extensions in Ampthill fall under permitted development rights, which means you may not need a full planning application. However, this depends on the size, position, and type of extension, as well as whether your property is listed or in a conservation area. We can advise you on this during our initial consultation.



