Organiser's notes
Start with the awkward fact: a lot of holiday-let agencies will not take a hen group, and some will cancel the booking if they find out after the fact. The houses below are the ones whose own listing says celebrations are welcome. “Ask the owner” houses are left off this page on purpose, because you do not want to be the one explaining to eleven people that the booking fell through.
Tell the agency it is a hen weekend. Do it in the enquiry, in writing. If they are fine with it you have that in writing; if they are not, you have saved a deposit. Expect a security deposit of £250 to £500, sometimes more for the bigger houses, refunded after departure.
Two nights is the usual minimum, three over bank holidays. Friday to Sunday prices on the agency page are often not the weekly rate divided by seven, so get the actual quote for your dates before you divide it by heads.
Count bathrooms, not bedrooms. Twelve women, two bathrooms and a 7pm table booking is a bad combination. Four or more bathrooms for a group of twelve is comfortable. The property page here shows the count where the agency gives it.
Hot tubs have rules. Most houses limit numbers in the tub and ask for no glass. Some charge for heating it, some switch it off after 10pm. Ask.
Noise. Even houses that welcome celebrations usually have a quiet time, and neighbours who will enforce it. A house with no near neighbours is worth more than one with a bigger games room.
Money. Collect the deposit from everyone before you book, not after. Put the total in a shared note with the per-head figure and the dates. Someone will drop out; decide now whether the rest absorb it or the dropout still pays.
The grid is sorted hot tub and games room first, then by size. Click through to the agency page for dates and the full terms.