The two projects, totalling 32.2MW, have been accepted under the Canary Island's wind power quota tax scheme. The programme is designed to back the development of 450MW of wind power capacity by putting it on a different tax regime.
Iberdrola has until the end of 2018 to build the 13.8MW Las Aulagas and the 18.4MW Chimiche II projects on the island of Tenerife. The developer said it would work with a local partner on the projects.
It is the latest in a string of project approvals on the islands this summer, according to Windpower Intelligence, the research and data division of Windpower Monthly.
In July, Spanish firm Gas Natural won approval for 71.3MW of capacity across 13 wind projects, which are set to use 2MW, 2.3MW or 2.35MW Enercon turbines on the islands of Gran Canaria or Fuerteventura.
Ecoener had two projects approved for 38.4MW of new capacity also on Gran Canaria.
At the end of July, the Instituto Tecnico de Energía Renovable (ITER) had its 18.4MW Granadilla-Arete with Endesa, and the 26MW Arico project approved on Tenerife.
The Las Aulagas and Chimiche II projects will be Iberdrola's first onshore sites on Spanish territory since December 2012 when it completed the 36MW El Egredal project in northern Spain.