Tom Sandoval is ripping Ariana Madixfor trying to force the sale of their shared house — ’cause he says he’s provided a reasonable alternative … buying her out with a fair price.

The “Vanderpump Rules” star spilled a little alleged tea about what he says is the real story about this house of theirs that Ariana wants to unload — the same one they bought together, and where they lived for a long time before their nasty breakup last year.

TS went onto Nick Viall‘s podcast this week and told his side of the story — basically, he claims Ariana is being petty … insisting he’s made a cash offer of $3.1 million to keep it for himself.

Tom explains that they purchased this house for significantly cheaper than what he’s offering her right now — so her turning it down, in his mind, is just her continuing to throw a fit about the affair. TS also claims she’s hardly there and that she hasn’t paid a single bill in months.

360aproko broke the story … Ariana sued Tom earlier this month in an effort to force a sale of their home, which they bought together back in 2019 for around $2 million.

But now, Tom’s firing back, saying … she’s doing the equivalent of flipping a Monopoly board when somebody’s losing. That’s exactly how he frames it … likening her to a little girl pouting.

It’s interesting … Tom agrees with Nick here — who says he can understand where Ariana is coming from, and why she would just want to sell the place without letting him have it.

With that said … Tom thinks she’s just being spiteful for spite’s sake. Clearly, he wants this place on his own — and his cash offer does sound pretty sweet.

Seems like they’re both digging in their heels and gearing up for a big fight over the house.

Stay tuned …