Both of the pupils currently enrolled at Ysgol y Garreg start secondary school in September.
The Waterloo Inn and retail units in Bangor are to be turned into 13 flats.
Gwynedd has the highest concentration of second homes in Wales and the council wants tough measures to protect communities.
It has worked in the European Alps, but could a free shuttle bus tackle traffic issues in Eryri?
The Menai Suspension Bridge, in Anglesey, is closed for the third time in about 24 hours.
Gareth Anthony Roberts said Bangor was "no longer a Welsh-speaking area".
Second homes and how to deal with growing numbers is a hot topic in parts of Wales.
A community council wanted a clause to only rent or sell the houses to Welsh speakers.
Staff shortages mean Welsh-language schools are having to use teachers who only speak English.
