Most NYC renters spend 30 minutes viewing an apartment before committing to a 12-month, $30,000+ lease. That is not enough. This checklist helps you do proper due diligence.
Red background = Critical items. Do not skip these.
1Before the Viewing (Online Research)
Do this research before you even schedule a viewing. It takes 30 minutes and can save you from wasting time on problem buildings.
💡Save Hours of Research
Each of these checks requires visiting a different NYC database. DwellCheck compiles data from HPD, DOB, 311, NYPD, MTA, and 10+ other sources into a single report — so you can complete this phase in minutes instead of hours.
Building History
- Check HPD violations at hpdonline.nyc.gov — any Class C (immediately hazardous)?
- Search 311 complaints for the address — patterns of heat, pests, noise?
- Check DOB for building violations and active permits
- Look up building age and construction type on ACRIS
- Search bedbug registry (bedbugregistry.com) for reports
Neighborhood Safety
- Check NYPD crime data for the precinct (CompStat reports)
- Search for recent shootings in the area (NYC Open Data)
- Look up 311 complaints within 500m — noise, rats, graffiti
Landlord Research
- Look up owner name on ACRIS — is it an LLC or individual?
- Search landlord name + "complaints" or "lawsuit" online
- Check if building is on any "worst landlords" lists
- Look for reviews on Openigloo, Google, or ApartmentRatings
Rent and Legal Status
- Is building rent stabilized? (Built pre-1974 with 6+ units)
- Check if building has 421-a or J-51 tax benefits (DOF records)
- Compare asking rent to recent rentals in the area (StreetEasy)
Time-saver: DwellCheck compiles all this data into a single report. Building history, safety data, transit access, and 50+ factors in one search.
Run a DwellCheck Report →2During the Viewing (Physical Inspection)
Take photos and videos of everything. You want documentation in case issues arise later.
Inside the Apartment
- Test all faucets — water pressure and hot water wait time
- Check under sinks for leaks, mold, or pest droppings
- Open cabinets and check for roach traps or evidence of pests
- Test all light switches and electrical outlets
- Check windows — do they open/close properly? Any drafts?
- Inspect walls and ceilings for cracks, water damage, or fresh paint (hiding issues)
- Test phone signal in each room
- Check closet and storage space
- Look at outlet placement — enough for your needs?
- Check if appliances are included and their condition
Bathroom Specific
- Flush toilet — proper pressure and no running?
- Check shower/tub for mold or mildew
- Look for exhaust fan — does it work?
- Check grout condition around tub/shower
Building Common Areas
- Check hallway cleanliness — trash, smells, condition
- Test elevator if applicable
- Check mailbox setup and security
- Look at front door lock system — buzzer, key fob, doorman?
- Observe garbage/recycling area condition
- Check laundry room (if building has one)
- Note any posted notices from management or HPD
Noise Check
- Stand quietly for 2 minutes — what do you hear? Street noise? Neighbors?
- If possible, visit at different times (morning, evening, weekend)
- Ask which walls are shared with neighbors
- Check proximity to bars, clubs, or construction sites
3Questions to Ask the Landlord/Broker
Building and Management
- How long has current management been in place?
- What is the typical response time for maintenance requests?
- Is there a super? On-site or just on-call?
- What is the protocol for emergencies (flooding, no heat)?
The Apartment
- Why did the previous tenant leave?
- How long has the apartment been vacant?
- What was the previous rent? (Helps identify overcharges)
- What work was done between tenants?
- Is the apartment rent stabilized?
Practical Details
- What utilities are included? (Heat, hot water, gas, electric)
- What is the internet situation? (Fiber available? Which providers?)
- Package delivery — where do packages go?
- Bike storage available?
- Pet policy if applicable
- Any planned construction or building work?
Red Flag Responses
Be wary if the landlord:
- Pressures you to sign immediately ("other applicants waiting")
- Refuses to answer questions about building history
- Asks for cash payment or wire transfer for deposit
- Will not provide their full legal name or building owner info
- Discourages you from reading the lease carefully
4Before Signing the Lease
⚠️NYC Lease Law Reminder
Since June 2019, NYC landlords cannot charge more than one month of rent as a security deposit. Broker fees, application fees, and other move-in costs are also regulated. If a landlord asks for more, they are violating the law.
Lease Review
- Read the entire lease — every page, every clause
- Verify the rent amount matches what was discussed
- Check move-in costs: first month, last month, security deposit, broker fee
- Confirm lease start and end dates
- Look for any unusual clauses (restrictions on guests, penalties)
- If rent stabilized, verify the rider is attached
Documentation
- Get everything in writing — verbal promises mean nothing
- Document existing damage before move-in (photos with timestamps)
- Get receipt for all payments (security deposit, first month)
- Keep copies of all signed documents
Final Verification
- Verify landlord identity — is this person actually the owner/authorized agent?
- Confirm apartment address matches lease exactly
- Verify any promised repairs will be done before move-in (get in writing)
Automate the Research Phase
DwellCheck pulls data from HPD, 311, DOB, NYPD, MTA, and 10+ other sources into a single livability report. Get building history, safety analysis, transit scores, and 50+ factors in seconds instead of hours.
Check Any Address — $2.99Tip: Print this page or save it to your phone before apartment viewings. Use browser print (Ctrl/Cmd + P) for a clean printable version.
Frequently Asked Questions
1What is apartment due diligence and why does it matter in NYC?
Apartment due diligence is the process of thoroughly researching a rental property before signing a lease. In NYC it matters more than most cities because leases are typically 12 months with no early termination clause, average rents exceed $3,000 per month, and NYC tenant law makes it difficult to break a lease without penalty. Spending a few hours on due diligence can save you from a year of problems in a building with chronic violations, pest issues, or an unresponsive landlord.
2How do I check HPD violations for a building in NYC?
Visit the HPD Building Portal at hpdonline.nyc.gov and search by address. You will see all open and closed violations organized by class: Class A (non-hazardous), Class B (hazardous), and Class C (immediately hazardous). Pay close attention to Class C violations and any patterns of repeat violations, which indicate a landlord who does not maintain the building. DwellCheck also compiles this data automatically when you search any NYC address.
3What 311 complaints should I look for before renting?
The most concerning 311 complaints are heat and hot water complaints (especially multiple in one winter), rodent and pest complaints, noise complaints from commercial establishments, mold reports, and lead paint concerns. Search 311 data at portal.311.nyc.gov or on NYC Open Data. Look for patterns over the past 2 to 3 years rather than isolated incidents. A building with 10+ heat complaints in one season likely has chronic heating problems.
4How can I verify if my NYC apartment is rent stabilized?
Check if the building was built before 1974 and has 6 or more units — these are the most common rent-stabilized buildings. You can also contact DHCR (Division of Housing and Community Renewal) to request the rent history for a specific apartment. Look up 421-a or J-51 tax benefits on the NYC Department of Finance website, as buildings receiving these benefits must register units as rent stabilized. The landlord is also legally required to provide a rent stabilization rider with the lease if the apartment qualifies.
5How do I research a landlord before signing a lease in NYC?
Search the building address on ACRIS (Automated City Register Information System) to find the owner name. Then search that name online along with terms like "complaints," "lawsuit," or "violations." Check if the landlord appears on the Public Advocate worst landlords list. Look up reviews on Openigloo, Google Reviews, or ApartmentRatings. If the owner is an LLC, which is common in NYC, try to find the managing agent through HPD records — the managing agent is who you will actually deal with for repairs and issues.
6What should I check during the physical apartment viewing?
Focus on water pressure (run all faucets and flush toilets), pest evidence (check under sinks, behind appliances, and closet corners with a flashlight), window function (open and close every window), electrical outlets (test with a phone charger), wall and ceiling conditions (water stains, cracks, mold), door locks and security, and building common areas. Also stand quietly for 2 minutes to assess noise levels. Take photos of everything for reference.
7What lease clauses should I watch out for in NYC?
Watch for clauses that waive your right to repairs, excessive late fees (NYC limits these), clauses requiring you to waive your right to a jury trial, restrictions on guests that are unreasonably strict, automatic renewal clauses without proper notice periods, and any clause requiring you to pay for building-wide issues. If the apartment is rent stabilized, make sure the rent stabilization rider is attached. Never sign a lease that lists a different rent amount than what was verbally agreed upon.
8How long should the entire due diligence process take?
Plan for 2 to 4 hours of online research per building (checking HPD, 311, DOB, ACRIS, and landlord reviews), 15 to 30 minutes for the physical viewing, and 1 to 2 hours for lease review. DwellCheck can reduce the online research phase to under 5 minutes by compiling data from all major NYC sources into a single report. Even with a tool, always do your own physical inspection and thorough lease review.
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