SPECIALIST STONEWORK IN OLNEY
Olney is one of those towns where the buildings genuinely tell you something about the place. The high street, the older cottages around the Market Place, the farmhouses on the outskirts — most of them are built from the same oolitic limestone that has been quarried around this part of Northamptonshire for centuries. It has a particular warmth to it and when it is done well, a new extension or a repaired wall looks like it has always been there.
At Astrum Construction we work on stone properties across Buckinghamshire and Northamptonshire and Olney is an area we know well. We have worked on everything from repointing tired cottage walls to building full extensions that match the original stonework. We are not the kind of company that sends a salesman round, usually one of our experienced builders will come out, have a look at what you have, and give you an honest view of what needs doing and what it will cost.
Why traditional lime mortar matters
A lot of people make the mistake of using modern cement on old limestone properties and it usually causes problems within a few years. Cement is harder than the stone itself, so it traps moisture rather than letting it escape. When that moisture freezes in winter it forces the stone faces to spall and crack. We use lime mortar because it is softer and more flexible, it lets the building breathe and move naturally with the seasons.
This matters especially in Olney where a lot of the older properties are in or around the conservation area and some are listed. North Northamptonshire Council has specific expectations around the materials used on these buildings, and we make sure any work we do meets those standards. We can advise you on what is and isn't likely to require consent before any work starts.
Stone extensions that look like they belong
If you want a new extension, porch, or outbuilding that sits naturally alongside your existing home, sourcing the right stone is half the job. We know which suppliers can match the warm golden tones of Olney limestone and we have access to reclaimed stone where that is a better fit for an older property. Getting the coursing, the face texture, and the mortar colour right is what makes the difference between an extension that looks like an afterthought and one that looks like it has always been there.
We manage the whole project — foundations, blockwork inner leaf, stone outer skin, lintels, and coping stones. We are also used to working around the access constraints that come with some of Olney's older terraced and semi-detached properties, where space is tight and the neighbours are close.
What to expect when you work with us
We give you a proper written quote that sets out exactly what is included. If we hit something unexpected — a footing that needs deepening, an existing wall that is in worse condition than it looked — we tell you straight away and talk through the options. We do not add costs on at the end without telling you first.
We are members of the Federation of Master Builders, which means you have a recognised code of conduct to fall back on if anything goes wrong, though in our experience it rarely comes to that. We are fully insured on every project and we are happy to provide references from previous clients in the Olney area if that helps you make a decision.
Get a quote for your stone project
If you are looking for a new stone extension that fits in perfectly with your existing home. You can look at our projects to see photos of the different types of stone we have worked with before. We can come over to your property in Olney and take a look at what needs doing. We give you a clear price and we don't add on extra costs for no reason. Every job is different and some stones are harder to work with than others but we can usually find a solution that fits your budget. Complete our contact form or give us a call to talk about your stonework Olney. Our team is happy to give you some honest advice on the best way to preserve your building for the future.
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.
Can you match the stone on my existing Olney property?
In most cases, yes. The limestone used on older Olney properties has a fairly distinctive appearance and we know suppliers who can provide a good match, including reclaimed stone where that is the better option. We will always bring samples to compare against your existing walls before ordering materials.
How long does a stone extension take?
A single-storey stone extension typically takes eight to fourteen weeks depending on size and ground conditions. Stone work is slower than brick because each course needs more care, but the result is considerably more durable. We will give you a realistic programme at the quoting stage.