Limited parking is available outside Mon-Fri after 4pm and on weekends.
Nearby Homebase (Hawker Place) has a customer car park with a (strict) 3 hour time-limit.
You can access Salt Cave NE London from 3 underground lines:
The closest station is Wood Street Overground station, where you can get the W16 bus (stop V) to Clifford Road, or just walk down Fulbourne Road for 10 minutes.
From Walthamstow Central Underground Station (Victoria Line), you can take the 212 bus (stop E) to Clifford Road.
From South Woodford Underground Station (Central Line), you can take the 123 (stop T) to Wood Street Library.