9 Del. C. § 506

(a) Immediately after the determination by the county government and the Division of Highways of the State Department of Transportation (Division) that the community in question meets the requirements of a suburban community specified in § 501(5) of this title, the Division, if such streets are to be maintained by the State, or the county, if such streets are not to be maintained by the State, shall advise the owners of such community of the requirements of that respective governmental agency. The owners shall be required to prepare and submit such surveys, plans, specifications and estimates of the cost of the improvement or improvements planned for such community.

(b) The Division or county may within its discretion prepare such surveys, plans, specifications and estimates as may be required on the owners behalf and may charge such owners reasonable costs for services provided. In no case shall the Division or the county provide or extend other than minimal costs or services to the owners of such community.

(c) In the preparation and submittal of surveys, plans, specifications and estimates of the cost of such improvements, the Division or county shall confer with the regional planning commission or department of planning of the county in which the suburban community is situated, if the county has a regional planning commission or department of planning. In no event shall the width of the right-of-way in such community be less than 10 feet.