The National Trust will launch more than 300 new websites covering each of its individual properties.
The new sites, which are being developed in-house, will be controlled by staff at each property. They will place an emphasis on interactive features and user-generated content, and will feature some history of the property, information for visitors and details of events being held there.
The first seven new sites are expected to be launched before the end of September.
The charity will also recruit a new head of digital media to manage a £2m annual budget. A National Trust spokesman said the first round of interviews for the post, which attracts an annual salary of about £60,000, were due to start in the next few weeks.
The spokesman said he was unable to confirm how much the charity was spending on creating the new websites.
Third Sector reported last year that the National Trust was investing nearly £5m over five years to overhaul the charity's digital communications.