Tŷ Unnos (plural Tai Unnos) means ‘one night house’ in Welsh and is an old Welsh tradition dating back to the period between the seventeenth and early nineteenth centuries.
It was believed that if a person could build a house on common land in one night, the land then belonged to them. The test was to have a fire burning in the hearth by the following morning, then the land around the house could be extended by the distance they could throw an axe from the four corners of the house.
Most Tai Unnos were originally made of turf and soil, with a roughly thatched roof. Once built, the walls could be replaced with clay and stone. The settlers usually worked in local quarries and mines and built smallholdings which they farmed.
The original Tai Unnos have now disappeared, but it explains why there are so many isolated cottages dotted across areas of North and West Wales, many being rebuilds of former Tai Unnos.
One of West Wales Holiday Cottages, Maes y Bryn, was built on the site of a Tŷ Unnos on common land claimed from land forming the Preseli hills, although the grounds stretch further than the distance thrown by an axe!
Even today, the owners pay the princely sum of 20p per year to the ancient Baronry for the cottage grounds and rights still exist for commoners to graze pigs and collect acorns on the land!


























