Grint, 32, has used his £40m Harry Potter earnings to develop a property empire
His latest venture sees him wanting to convert the barn on the grounds of his Herts manor house into three eco-friendly family homes
The plans have thus far been met with objections by residents, the Wildlife Trust and the local parish council
Grint's mansion lies in 22 acres of grounds, and has six bedrooms, two swimming pools and a private cinema
The actor welcomed a baby daughter named Wednesday with his long-term girlfriend Georgia Groome, 29, in May last year and has an estimated net worth of £36m