Flats on First

📍 21 Charles St, Cambridge, MA 02141

📋 Property Overview

Studio–3 Beds, 1–2 Baths, available in Cambridge, Massachusetts. It measures 439–1303 Sqft. Rent is $2,840 a month. Features in the home include patio. Shared amenities include game Room and fitness Center. Pets are allowed. Availability: 1 Unit Available.

📐 Floor Plan Details

• 2 bd · 1 ba · 909 sq ft$4,450Available 2026-11-24
• 3 bd · 2 ba · 1,303 sq ft$5,9651 unit available
• Studio · 1 ba · 439 sq ft$2,840Available 2026-10-29
• 1 bd · 1 ba · 764 - 767 sq ft$3,570Available 2026-09-03
• 2 bd · 2 ba · 1,050 sq ft$4,730Available 2026-10-06

🧾 Move-in Costs & Lease

Available

1 Unit Available

Application fee

$60 per applicant, paid to RivoRent

Property amounts are as published by the source and may change. Confirm before applying. The application fee is RivoRent's own and is the same on every listing.

🛡️ Renters Insurance — Estimated Cost

Based on what Massachusetts renters actually paid: NAIC industry data for 2023 (average HO-4 premium, 452,865 policy-years), adjusted to July 2026 with the U.S. Bureau of Labor Statistics tenants' insurance index. It is a market average, not a price for this building and not a price for you.

Your own price depends most on your credit-based insurance score, your claims history and which carrier you choose. In published Ohio figures the same coverage ranges from $127 a year at excellent credit to $933 at poor credit. We do not ask for any of that, so we cannot narrow this for you.

🐾 Pets

Pets

Allowed

✨ Features & Details

• Pet Friendly
• Patio
• Fitness Center
• Bicycle storage
• Barbecue Area
• Intercom system
• Groom Room
• Gourmet Kitchens
• Open Air Amphitheater
• Community Kitchen
• Landscaped Courtyards
• Game Room
• 909 sq ft
• 1,303 sq ft
• 439 sq ft
• 764 - 767 sq ft
• 1,050 sq ft

📊 Property Facts

Property type

Apartments

🏡 Floor Plans