There are many hotels in the city and areas surrounding Florence.  Here are a few, or please feel free to Google more.

HOTEL:

--  Hotel Giglio

    Via Cavour, 85

    50129, Firenze

Bed and Breakfast:

--  B&B Florentia

    Via Fra Jacopo Passavanti, 49

    50133, Firenze

    +39 055 573 873

--  Villino la Magnolia

    Via Mannelli, 135

    50132, Firenze

    +39 055 2466015

Youth Hostel:

--  Youth Hostel Firenze 2000

    Viale Rafaello Sanzio, 16

    50124, Firenze

    +39 055 2335558

    yhf2000@dada.it