As an alternative to staying in a hotel many families, and especially those travelling with children, prefer to stay in an apartment. In Sevilla there are plenty of short term let holiday apartments to choose from. There are also a few apart-hotels available for those who prefer the combination of the self-catering apartment with quality hotel services.
You can book your holiday apartment through an agency or direct with the owners. There are many search engines for both alternatives.
If you book through an agency, it is usually more expensive, but the agency will normally guaranty the standard and the equipment of the apartment. If you book direct with the owner you only has his word for the standard of the apartment.