The Old Schoolhouse was built to educate the children of mill workers in the mid-19th century, but became a Sunday School and was later converted into a church.
In 1929 a bellhouse was added, along with a clapboard porch - now painted mint green.
The last church service was held in 1990 and the building fell into a state of “perilous” disrepair, but neighbours flagged up its historical significance to heritage bodies.
It was taken over by the National Trust for Scotland in 2005 - granting it A-listed status, and since then has been converted into a one-bedroom home, complete with a luxurious en-suite bathroom.
The tiny house, which won the highest building conservation prize in Europe, is for sale for offers over £155,000.
It has an open-plan living room, dining area and kitchen, and is right next to a river with a giant garden.
Despite the history of the building and its beautiful location, it is going for the less than a one-bedroom pad in Edinburgh’s fashionable Stockbridge area - on the market at offers over £189,995.
Hannah Christiansen, who works for estate agents Galbraith, described it as “a wee gem”.
She said: “It’s got quite a colourful past.
“It was built in the mid-19th century and was originally a school.
“It really was one big room, then two rooms the schoolmaster used.
“It was quite a simple structure and was built using clay because there was a lack of stone at the time.
“At the turn of the century it became the Sunday school.
“It has remained quite core to the community.
“After being a school it was turned into a place of worship.
“In 1990 it was closed to the public and became quite dilapidated.
“It was made a building of national importance, then the National Trust took it over.
“If anyone wants to make considerable alterations it’s something they need to speak to Historic Scotland about.
“There will always be an interest from the National Trust for Scotland.
“It has been a home for several people for the past 15 years.
“Despite its unique construction it meets the needs of modern practical living.
“It’s a one bedroom so maybe not a family home but it would be a superb holiday let or AirBnB - it ticks all the boxes.
“It would also be perfect for any looking to downsize or for a second home.”
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