To piggy back on my last post (which hopefully put a bug in your ear about 2013 inauguration events), I've done some preliminary research on room rates in the Washington, DC metropolitan area over the highly anticipated event dates.
Looking at January 18th-22nd (Friday-Tuesday), the good news is that hotels are still offering availability. Transient room rates are hovering around the $300-$500 range for value and select-service hotels, the $600-$800 range for full-service hotels, $900-$1,200 for luxury hotels and then upward from there. These are standard room categories, as suites of course will incur higher rate structures, especially those with the ability to serve as hospitality suites or function spaces. Because transient room rates are typically higher than group room rates, expect a slight decrease (but maybe not much!) if you go choose to go with a binding agreement.
Given the expansive mileage of the Washington, DC metropolitan area, value can be had the further you stretch outside the city. Rates drop as you travel into Virginia and Maryland, most significantly once you reach destinations like Tyson's Corner in Virginia and College Park in Maryland. For the most convenient accessibility, stick to locations that are on a metro line.