PARKER: HOUSTON LOTS MUCH BIGGER THAN WE THOUGHT Acknowledging that the city underestimated the cost of the average homeowner’s drainage fee by $3.25 per month, Mayor Parker blames faulty estimates of the size of the typical Houston residential lot. The city had presumed that the average Houston home had a 1,875-sq.-ft. impervious footprint and sat on 5,000 sq. ft. of land. But appraisal district data and satellite images now show that the typical Houston home sits on a 7,500-sq.-ft. lot and has 2,850 sq. ft. of impervious surface. [Houston Chronicle]