Carbondale Council Discusses Impervious Surface Regulations Impacting ADUs

The Town of Carbondale Planning and Zoning Commission meeting on August 28, 2025, focused on the ongoing debate surrounding impervious and pervious surface regulations, particularly in relation to Accessory Dwelling Units (ADUs). The discussion highlighted concerns about how current regulations may hinder development and the need for a reevaluation of these policies.

Commission members expressed a consensus that the existing impervious surface calculations are overly restrictive, especially for properties looking to add ADUs. One member emphasized the importance of retaining stormwater on-site but argued that the current approach is counterproductive to development goals. The suggestion was made to exempt ADUs from impervious surface calculations, allowing for more flexibility in property development.

Several members supported the idea of simplifying the impervious surface regulations across different zoning districts. The discussion included proposals to potentially reduce the impervious surface burden in the Old Town Residential (OTR) zone and other areas that permit ADUs. A member suggested that the footprint of an ADU could be counted as only 50% of its area towards impervious limits, which would still maintain some level of control while encouraging development.

Concerns were raised about the long-term implications of reducing impervious surface limits, particularly regarding tree canopy and landscaping. Members acknowledged that while increasing development opportunities is important, it should not come at the expense of the town's character and environmental health.

The meeting concluded with a recognition that the complexities of the impervious versus pervious surface debate require further exploration. The commission agreed to continue discussions on how to balance development needs with environmental considerations in future meetings.