There are several car parks within a 5-10 minute walk at buggy pace of the theatre. The nearest car park is on Pound Lane and costs £5.10 for up to 3 hours (the postcode CT1 2BZ should get you close). There is also a large car park on St Radigunds Street (postcode CT1 2AA) which also costs £5.10 for up to 3 hours.
If you are attending a daytime performance, you could also consider using the Park and Ride scheme which terminates at Canterbury Bus Station, a 10-15 minute walk from the theatre at buggy pace. For more information please visit the Canterbury City Council website.
Please note that vehicles parked on the forecourt of the Marlowe Theatre are liable for parking fines, except those displaying a valid Blue Badge.