There aren't many well built houses that have been built within the past 10-15 years. The only ones that have been are generally architect designed built by a builder that is being paid to do a good job. The run of the mill Hickinbotham, Oakford, Statesman, Fairmont crap are basically shelters from the weather not houses. I'm yet to see a modern generic house built and sealed well.
But yeah, it's cold. Strange as it should be 35 all year round right?