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.”

No provider awarded subsidy for seasonal inter-island ferry service
Guernsey's key industry 'stable' in a turbulent world
Pubs can apply to stay open later to show World Cup games
Landowners reminded to clear Guernsey's streams of vegetation
Guernsey homelessness charity 'deeply concerned' at rising support need
Plans lodged to improve Guernsey's sea water Children's Pool
States record £45M surplus, but still warn of Guernsey's funding gap
Warmest Guernsey spring on record