The Planning Authority acted within hours to a report of damage to the roots of trees in St Sampsons.
A passer by reported the damage to two of the 15 poplar trees on Monday evening (13 April).
By Tuesday, the Development and Planning Authority had served a six month tree protection order on the developer, who has 28 days to appeal.
Deputy Neil Inder, who heads up the DPA, says it was important to move fast:
“We lost some 2,000 trees in Storm Goretti and many in Storm Ciaran.
"Our trees deserve better, and I know I speak for the majority of islanders who find this activity disappointing, if not cynical.
“Having reviewed the Guidance on Tree Protection, although effective in this instance, I’m not convinced that it is strong enough to protect against developer adventures.
"Our Authority will focus on this matter and work with our charitable partners to ensure this nonsense doesn’t happen again.”


Guernsey students heading to university to receive Meningitis B vaccine
Guernsey teen set for month-long marathon swim
Guernsey Post introduce new services from early July
Guernsey Waste improves the quality of its free garden compost
Guernsey cat lover to ride the length of Britain in nine days
Unclaimed CI Co-op cash funds community projects
Work to commence on 70 affordable flats and homes in Guernsey
A new tax, more 'proportionate' to wealth, to be put to Guernsey's States