Dene Court Reserve is listed as a nature reserve on Dene Court Lane in Greenhithe, on Auckland's North Shore. It has a 3.0 rating on Google. The website linked to the listing is for Dene Court Villa, so it may be a neighbouring business rather than the reserve itself.
A good nature reserve protects habitat for plants and wildlife while letting people walk through it quietly. Reserves along the upper Waitematā Harbour are often a mix of bush, mangroves and tidal edges, so expect uneven tracks and soft ground, and check the tide if the path runs near the water. Regulars know that early mornings and the hours after rain are good for birdlife, that mud is common after wet weather and that binoculars help. Stay on the tracks, keep dogs out where rules say so, never disturb nesting birds and take your rubbish home. Wear sturdy shoes, bring water and sun protection and check where to park, as access on a lane may be limited. A lower rating may reflect access or upkeep, so check recent reviews.
For anyone exploring Greenhithe and the upper harbour, Dene Court Reserve is a quiet local green space to walk.