A tower house from 1550, and room for twenty.
First thing to know: Kilmartin Castle isn't an event venue, and its owners say so plainly. It's a five-bedroom castle you book for yourselves, and a small number of couples marry at or around it each year, twenty people at most. It was built in 1550 for John Carswell, the Rector of Kilmartin, spent two hundred years as a ruin, was restored in the 1990s and renovated again in 2019. I've been the celebrant here twice, in October 2024 and August 2025.
How a wedding this size works
You book the whole castle as accommodation, with a three-night minimum, and its five guest bedrooms sleep up to ten adults. Only the people staying have access to the castle itself. Your wedding can be up to twenty people in total, the two of you included, and once you're more than ten, dinner moves out to the glasshouse in the grounds, which seats twenty. There are house rules as well: no fireworks and no amplified music, because this is a small village surrounded by farms.
What I saw from the front
In October 2024 the schedule was signed at the long wooden table in the glasshouse, with greenery climbing up the glass all round, and the confetti came afterwards out on the lawn below the tower. It was a handfasting, and with twenty people a handfasting stops feeling like a performance and starts feeling like a conversation. The August 2025 wedding had its own touch: the rings were hidden under two of the guests' chairs, and finding them was part of the ceremony.
That's the gift of a micro wedding: everyone in the room matters, so give people jobs. And plan the day around the weather rather than against it. Argyll changes its mind quickly, and a castle with a glasshouse gives you somewhere lovely to go when it does. If you're weighing up twenty guests against just the two of you, read micro-wedding vs elopement first.
Kilmartin Glen
The castle sits in a glen with the most important concentration of Neolithic and Bronze Age remains in mainland Scotland: standing stones, a henge, and a line of five burial cairns running south from the village, with Glebe Cairn just to the west of it. Kilmartin Museum, in the village, tells their story. In 2023 the New York Times put the glen fourth on its list of places in the world to visit. Give yourselves a slow walk among the cairns the morning after. After a wedding, it's a good place to feel how long people have been marking the moments that matter.
The legal bit, handled
A humanist wedding in Scotland is legally binding, and as a Humanist Society Scotland celebrant I look after every legal word of it: the declarations, the schedule, the witnesses. The castle's own wedding page points couples who want a non-religious ceremony towards a humanist celebrant, and I'm a humanist wedding celebrant covering Argyll, from Kilmartin down to Loch Lomond. The castle puts itself at less than two hours from Glasgow. I write every ceremony from scratch, and my elopement and small wedding page has more on marrying with only your closest people round you.
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More Argyll, Trossachs and Perthshire venues I know inside out: Isles of Glencoe · Fruin Farm · Altskeith Country House · Kinlochard Village Hall · Tay House, Dunkeld · Guardswell Farm