The plush Victorian mansion lies on the former Royal hunting ground of King Robert the Bruce.
The incredible original architecture and sweeping Scottish scenery is certainly a step above the London garage.
Although for those wanting a city experience, the London garage is perfectly located within walking distance to some of the city's best sites.
The closet tube station is an easy 0.2 mile walk to Bond Street or 0.3 miles to Marble Arch.
In 2016, a garage in Chelsea became a UK record holder when it sold for £670,000.
The double garage was between two large homes near the River Thames.
But the Portman Square listing surpasses the Chelsea price tag by a huge £80,000.
Astoundingly, for the same cost, drivers could park in a nearby NCP car park on a season ticket price for an entire 140 years.
The most expensive car parking spot in the UK was near the Royal Albert Hall in London and sold for £400,000, slightly more than half the price of the Portman Square listing.
Last year, a run-down single car garage went on the market for the princely sum of £100,000 – more than a three-bed terrace house in some parts of the country.
The garage, located in Bosham, close to Chichester Harbour, is in a desirable area where a three-bed house is currently for sale for £850,000 without any parking space.
The most expensive places to park in the UK have also been revealed.
Dumbarton castle in Scotland went on the market for £675,000 last year The closet tube station is an easy 0.2 mile walk to Bond Street or 0.3 miles to Marble Arch The 303sqft space in central London is in a 24-hour portered block of flats in Portman Square Selfridges and Oxford Street are just a stones throw away We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 . You can WhatsApp us on 07810 791 502. We pay for videos too. Click here to upload yours.