
SKILLED STONEWORK IN AMPTHILL
Ampthill and the villages around it are full of stone buildings that have been standing for two, three, even four hundred years. Done well, stonework outlasts almost every other building material. Done badly, it causes damp, cold and expensive problems. At Astrum Construction, our stonemasons work on both ends of the spectrum — new stone features on contemporary homes and careful, historically accurate repairs on some of the oldest properties in Bedfordshire. Whatever the project, we match the materials and technique to the building.


Why Traditional Stonework Matters
The biggest single mistake made on older stone buildings is using modern cement mortars in place of lime. Cement is rigid, traps moisture and cracks the stone as the building moves through the seasons. Lime is flexible, breathable and works with the wall rather than against it. Our masons work in lime as a matter of course on period properties, and we source stone that matches the original where replacement or patching is needed. That's particularly important in Ampthill's Conservation Area, where what you can and can't do is tightly regulated.

The types of Stonework We Handle
Our stonework covers the full range. Repointing on older properties using the correct lime mix. Full wall rebuilds where previous repairs have failed. Stone cladding and feature walls on new builds and contemporary homes. Chimney repair and rebuild. Garden walls, gateposts and landscape features. Restoration of carved detail - lintels, quoins, copings, mullion windows. Where the work is part of a listed building refurbishment, we handle the consent application and the heritage specification alongside the build itself.
Stonework rarely sits in isolation. Most of our stone projects are part of wider work — a house renovation where external repairs are needed alongside interior reworking, or a house extension where new stonework has to be tied into old in a way that looks right in twenty years, not just on handover day. On full listed building refurbishment projects the stonework is often the headline item, with consent conditions shaping exactly how the work can be done. We coordinate all of this under one contract, which keeps things simple for the client.
Twenty Years of Heritage Experience
We've been doing this for more than twenty years and we're registered with the Federation of Master Builders, Trustmark and CHAS. Our masons are skilled at the craft side of the work but equally importantly, they understand the buildings they're working on. They can tell when a crack is structural versus cosmetic, when a lintel is failing rather than just weathered, and when a repair that looks straightforward is going to open up into something much larger. That experience saves money in the long run, because we flag problems before they become emergencies.
Ready to Start Your Stonework Project?
If you've got stonework that's giving you concern, or you're planning a project that involves stone, new, old or both, get in touch. We'll come out, inspect the work, and give you a clear view of what's needed and what it's likely to cost. For heritage properties, we'll also flag any consent considerations so nothing comes as a surprise once the work starts.
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 Do I Know If My Stonework Needs Repointing?
The most obvious signs are mortar that is crumbling, recessed or missing altogether between the joints. You might also notice damp appearing on internal walls after rain, which often points to failing mortar letting water in. If you are not sure, we are happy to come out and take a look. Sometimes it is straightforward repointing and sometimes the issue runs deeper, but either way you will get an honest assessment rather than an inflated scope of work.
Do You Handle Stonework as Part of a Larger Renovation or Extension Project?
Yes and this is actually how a lot of our stone projects come about. Clients planning a house renovation or extension realise that the external stonework needs attention at the same time, and it makes sense to handle it all under one contract. Tying new stonework into old in a way that looks right over time requires skill and planning and we factor that into the programme from the start rather than treating it as an afterthought.



