
der Stellplatz
parking space
A marked or assigned area intended for parking a vehicle, especially a car.
Zu jeder Wohnung gehört ein eigener Stellplatz in der Tiefgarage.
Each apartment comes with its own parking space in the underground garage.
parking space / pitch
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parking space
A marked or assigned area intended for parking a vehicle, especially a car.
Zu jeder Wohnung gehört ein eigener Stellplatz in der Tiefgarage.
Each apartment comes with its own parking space in the underground garage.

pitch
An assigned spot at a campsite or special area where a motorhome, caravan, or tent can be parked or set up.
Wir haben für das Wochenende einen Stellplatz direkt am See gebucht.
We booked a pitch right by the lake for the weekend.
'Stellplatz' (parking space / pitch) is a compound word made from the verb 'stellen' (to put/place) and the noun 'der Platz' (space/place). So it literally describes a place where you put something, in this case a vehicle.
Finden wir hier in der Nähe noch einen freien Stellplatz?
Can we still find a free parking space near here?
You can tell from the context what kind of 'Stellplatz' (parking space / pitch) is meant. Words like 'Auto' (car), 'Tiefgarage' (underground garage), or 'Wohnung' (apartment) point to a parking space. Terms like 'Camping' (camping), 'Wohnmobil' (motorhome), or 'Zelt' (tent) refer to a place for camping.
Der Stellplatz für unser Auto ist direkt vor dem Haus.
The parking space for our car is right in front of the house.
When it is about a parking space for a car, 'Stellplatz' (parking space) is often combined with verbs like 'mieten' (to rent), 'suchen' (to look for), or 'finden' (to find). Common location phrases are 'in der Tiefgarage' (in the underground garage) or 'im Hof' (in the courtyard).
In der Innenstadt ist es fast unmöglich, einen kostenlosen Stellplatz zu finden.
In the city center, it is almost impossible to find a free parking space.
In a camping context, a 'Stellplatz' (pitch) is often 'gebucht' (booked) or 'reserviert' (reserved). Typical phrases are 'ein Stellplatz für ein Wohnmobil' (a pitch for a motorhome) or 'ein Stellplatz auf dem Campingplatz' (a pitch at the campsite).
Wir sollten den Stellplatz für unseren Wohnwagen frühzeitig reservieren.
We should reserve the pitch for our caravan early.
parking space / parking lot
Both words refer to an area where a vehicle can be parked. Parkplatz often refers generally to a place to park, while Stellplatz places more emphasis on a specific marked or assigned space. Parkplatz fits for an open space on the street; for a permanent space at a house, Stellplatz is more suitable.

Vor unserem Haus ist der markierte Stellplatz für unser Auto reserviert.
The marked parking space for our car in front of our house is reserved.
Vor dem Supermarkt suche ich noch einen freien Parkplatz.
I am still looking for an empty parking space in front of the supermarket.