- Barcelona : Some of the well-known Barcelona based agencies are ApartmentsBCN and Inside Barcelona. This post on how to book short term vacation rentals in Barcelona has all the details.
- Madrid : For Madrid, you can probably try Only Apartments
- Seville : Sevilla5 and veoapartments are local specialists in vacation rentals. You will find more details in this post – vacation rentals in Seville
- Coastal Regions : For the region of Costa Brava, Costa del Sol, it
might make sense to hire the entire apartment. HouseTrip only lists people wanting to rent entire apartments or villas for their holidays, rather than rooms.
- For Andalusia and Basque country, you can try Casa Rurales (Rural homes). You will find a good collection in this site
- You should also try Spain-holiday which is a pan Spain vacation rental site.