We really enjoyed staying at Vitor's house in Colares with our family. We had a very warm welcome by Vitor and his wife, and they also gave us some good advice on where to dine. There are fantastic places around: Crôa, Adraga, (both located at the beach with great views on sunset), Ribeirinha right at Colares.
The house was just perfect with everything we needed, also it is perfectly located for day trips to Lisboa, Sintra, Cascais and all the other great places around.
I'd definitively recommend Vitor's place for a family trip to the Lisbon area.