Do you have a laundry service?
'Lavanderia' — stress the fourth syllable: 'la-van-de-RÌ-a'. Four clear syllables.
Use for longer stays when you need clothes washed. Many mid-range and upscale Italian hotels offer in-house laundry or dry-cleaning.
'Avete' (you have, plural) is the standard way to address hotel staff collectively. 'Servizio di lavanderia' is the standard phrase for laundry service. 'Lavanderia' can also mean launderette.
Posso mandare questi abiti in lavanderia?
Can I send these clothes to the laundry?
Directly offers items for laundry
Quando sarebbero pronti?
When would they be ready?
Follow-up about turnaround time
C'è una lavanderia automatica qui vicino?
Is there a self-service launderette nearby?
Alternative for budget travellers
Italian hotel laundry services are usually priced per item (per capo). Dry-cleaning (lavaggio a secco) is separate and more expensive. For casual items, a nearby lavanderia automatica (coin laundry) is a much cheaper option.