There are plenty of accomodation options in the vicinity of the campus. Here are some options, we have arranged with the first two to hold contingents for us:
(10 rooms). Contact email@example.com mentioning «Higher Structures Lisbon 2017». Prices: single 37,00€, double 59,00€. Deadline: 1st May
(Update, 2017-05-04) Since the deadline has expired, they are no longer holding the rooms for us, although there are reported to still be 8 rooms available.
(10 rooms). Contact firstname.lastname@example.org mentioning «Higher Structures Lisbon 2017». Prices: single 55,00€, double 62,00€. Note: unless the customer gives a credit card number the room will only be held until 4 p.m. on the day of arrival. No deadline but subject to availability, i.e. book as soon as possible.
Wider areaIf you prefer you may try booking through Housetrip or booking.com; anywhere near a subway will make it easy to reach the campus. Book soon though, it will be tourist season.
Note: All prices are plus 1€ per night Lisbon city tax, which is paid by the hotel guest.