I have a 1950's house in Toronto. The front porch(not quite) is 30 ft by 5"5'', has a roof, but no sides and a concrete floor. The porch faces due north here in Toronto, Canada.

I want to enclose this to provide privacy, improve energy conservation but still allow light into the front window (6ft long by 5 ft high).

I would be grateful of any suggestions.

Check out options at your local home center, they should have plenty of options available and maybe even a computer which can visualize some of the effects for you. Also check the phone book and newspaper for local contractors who could provide some options.

Much will depend on your pocketbook and the design of your house. There are many window systems available. It can be made of all glass, or partial with wood enclosures. You really have to shop around in Toronto for contractors who specialize in this type of work. Concentrate on those who specialize in patio enclosures.