Wondering where the priciest piece of residential real estate is in south Dublin at the moment? Smart money has to be on Lansdowne Place, the new Joe O’Reilly-led luxury apartment scheme in Ballsbridge on the site of the former Berkeley Court Hotel where not-yet-built apartments are commanding more than €1,000 per sq ft. Finished to an unprecedented standard more often associated with premium schemes in Manhattan or London, the two beds are commanding anywhere from a million euro upwards.

But this is only in the ha'penny place compared with a recent sale in Dublin 6. In May we flagged a little one-bed cottage in Ranelagh beside Sandford Park School, and by little we mean tiny, at 25sq m/270sq ft. Number 8 Colliers Ave, described as a "a quaint cottage full of character and charm" came onthe market with an asking price of €220,000 through Sherry FitzGerald. By September it had sold and recently listed in the residential Property Price Register with a sale price of €304,000. That's a full 38 per cent above the asking price, and works out at €1,125 per sq ft.

It’s a lot of money for a walk-in one bed, with a tiny porch into the main kitchen/living/ dining space and a double bedroom to the rear. But clearly Colliers Ave represents hot property at the moment. Since we wrote about number 8, four properties have sold on the same small cul-de-sac. Number 5 with 54sq m/581sq ft it was asking €350,000 through DNG and appeared sold for €365,000 in May. In August, number 4, a tasteful refurb of 86sq m/ 926sq ft sold for €580,000 on an asking price of €525,000. Then in recent weeks, number 7 a two bed of 45sq m/484sq ft seeking €350,000 through agent OMD, appeared sold for €450,000, a full 28 per cent above the asking or €930 per sq ft.

Is there something on Colliers Ave we don’t know about?