Some holiday homes are being built nearby, but it will have very little impact on you. We're currently at the Farkonia juat opposite the Pernera and it hasn't affected us at all.
They have been building outside the pernera beach for years, half the time in summer its just left. Portland told me that there were building works going on outside the car park, but all the hotels are on the front and sides, so you will be fine.