Thurrock Council has taken successful court action against three men who built on Green Belt land without permission.
The council secured a court order over the construction of hardstanding and septic tanks at Buckles Lane, in Ockendon. It was also granted an interim injunction concerning another nearby site.
Under the court order David, Glenn and Dean Remblance must halt work and re-seed the land to return it to its previous Green Belt condition. The court order applies also to 'any persons unknown'.
The defendants were ordered to pay the council £30,000, with an assessment to be carried of how much they should pay of the remaining £21,000 of costs.
Council leader Rob Gledhill said: "This legal action shows how seriously we take the issue of unauthorised development and demonstrates we will take effective legal measures to prevent and rectify further damage to the green belt around Buckles Lane.
"We have promised we would take action to tackle the decades of unchecked development on the site and this is the first of many such and similar actions we will need to take to finally resolve this issue.”
A hearing is due in December to decide whether the interim injunction should be made final.