Justin Bieber -- I'm Lookin' To Move To Ranch Country!

Justin Bieber has been looking at estates in an area not far from where he lives now ... but it's clear he wants to trade neighbors for horses.

Real estate sources tell TMZ ... Justin has been looking at homes in an area called Hidden Valley -- 20 miles from where he currently lives in Calabasas.

We're told Justin has his eye on a particular area of Hidden Valley -- White Stallion Estates. There are only 10 homes and each has around 20 acres. There are lots of horse ranches in the area, but Justin's not specifically looking for horse property.

Justin is also interested in Portrero RD in Hidden Valley ... most of the homes are 20 acres and up.

Justin wants between 10 and 20 acres, so both areas fit the bill.

Our sources say Justin wants out of Calabasas immediately -- as soon as he finds a place, but now we're told he's been quietly looking to move for 3 months.

We know Justin's people have spoken to his realtor and made it clear -- get him out of a gated community where there are rules and regulations and nosy neighbors.

We're told Justin was particularly interested in one home on Potrero, but he waited and the house just sold for $9.5 million.

As we first reported, Justin wants space not only to rid himself of neighbors ... he wants room to roam on ATVs. He also wants a skate park.