The Seoul hotels and resorts directory contains a range of hotels to suit all budgets - from low-cost pensions to 5 star hotels and resorts, all searchable by destination. The AsiaRooms website provides hotel listings and an on-line reservation service for just about all South Korea hotels. Their list is extensive and wide-ranging.
Another useful site for hotel hunters is HotelsCombined, which automatically compares the best hotel reservation sites to find the cheapest options according to your chosen criteria. Remember to check out the comments and advice left by previous clients of the hotel you’re considering, although these can sometimes be contradictory.
If you’re looking for a more intimate and homey accommodation option, the Korea Bed and Breakfast and Inns Directory lists a wide selection of B&B’s for you to choose from.