A sparse 1.2hectare block of land surrounded by expanding suburban development has been put on the market after being owned by the same family for 60 years.

The huge block and tiny home that sits upon it in Salisbury, a northern suburb of Adelaide, is up for auction on Tuesday after the owners rejected the offers of developers for decades.

Harris Real Estate agent Tom Hector told 7News the family had finally decided to put the property up for sale after their parents passed away.

Mr Hector said the owners had been approached by developers many times over the last 30 years.

'It's a very sad and emotional sale,' Mr Hector said.

The property has a price guide between $3million and $3.3million. 

The 'truly rare' property is 'ready for almost immediate development', according to the listing on realestate.com.au. 

It is advertised as being 'an unmatched residential building opportunity'. 

Mr Hector said he had received a 'huge amount' of interest in the listing.

'There are very few parcels of land left of more than 1000sqm in the northern corridor of Adelaide,' he said.

The only structures on the property are a small shed and a three-bedroom house built in 1955.

The charming home is something of a time capsule, featuring original furnishings.  

The parcel of land sits behind Little Para Golf Course and is 'a stone's throw' from Hollywood Plaza and Parabanks Shopping Centre.

Mr Hector told 7News there were many options for the land to be developed.  

'The developers have to let their imagination go wild, subject to what they can do with an urban planner,' he said.

The median house price in Salisbury is $610,000, an increase of 22 per cent over the past year. 

The median unit price has seen a year-on-year increase of 7.2 per cent and is $370,000.

A Sydney family has also defied multimillion-dollar approaches from developers for their home on a 1.99hectare block, which is similarly surrounded by development. 

The Zammit family's home is in the middle of a new-build development in The Ponds area, near Quakers Hill in Sydney's north-west, which has seen hundreds of high-density detached homes being built.

But while their neighbours gradually sold up and moved out over the years, the Zammits have refused to sell despite offers estimated to be as high as $60million.

The home is surrounded by around 750m of fencing to hold back the burgeoning and ongoing construction work erupting around them.

The owners admit the area is no longer recognisable from when they first moved in 16 years ago.

'It used to be farmland dotted with little red brick homes and cottages,' mother Diane Zammit, 50, told Daily Mail Australia in 2022.