Annie :
Your lot may have been intentionally designed as a stormwater conveyance lot. Instead of the roadside swale simply continuing under another driveway culvert, the subdivision drainage may turn at the end of the cul-de-sac and use a side-yard/rear-yard swale or ditch to carry water to a downstream pond, inlet, wetland, or other discharge point. Pull your property survey and subdivision plat. Look for wording such as Drainage Easement, D.E., Stormwater Easement, Drainage/Utility Easement, particularly along that side property line and across the backyard. Then, ask who is responsible for maintaining that drainage feature, because that could fall to the homeowner, HOA/CDD, developer, municipality, or another party depending on the subdivision documents. Also, sometimes the developer anticipates that an end-of-cul-de-sac conveyance will eventually be piped or provided with a drainage structure, but the horizontal/site contractor doesn’t complete it correctly. You need to find out.
2026-08-22 19:01:44