Condo Book Research
Studies of the condo offering plans filed with the New York State Attorney General: how long approval takes, what new buildings budget, and who developers hire. Every number comes from the plan records and is recomputed as new plans are filed.
Condo Insurance Costs in NYC Are Rising: Here's How Much
NYC condo insurance budgets rose from about $65 to $119 per apartment a month between 2020 and 2025-26, from 1,100+ offering plans. What's driving it.
How Much Extra Do You Pay for a Herringbone Floor?
Which new NYC condos have herringbone or chevron wood floors, how common they are, and what those buildings ask per square foot, from 2,000+ offering plans.
How Much Extra Do You Pay for a Marble Counter?
Marble, quartz, quartzite or granite? What kitchen counters new NYC condos specify, how that has changed, and what marble-kitchen buildings ask per square foot.
Near the Subway on a Budget: What a 1-Bedroom Costs
54% of recent one-bedroom sales in new NYC condos were within a 5-minute walk of the subway
Where to find a new NYC condo one-bedroom within a 5-minute walk of the subway at $700K, $1M and $1.5M, from recorded sales: buildings, stations, prices and sizes.
How Much More Does It Cost to Buy Near a Subway?
9% the most a longer walk to the subway moved price per square foot within the same neighborhood
Do NYC condos close to the subway sell for more? We matched new-condo sales to each building's walk to the train. The answer: mostly it's the neighborhood, not the walk.
How Much Should a Condo Spend on Supplies, by Building Size?
$200 per unit a year for building supplies in a typical new NYC condo budget
Building supplies, repairs, management, staff and elevator costs per unit per year in new NYC condo budgets, by building size, from offering plans.
How Much Should a Condo's Utilities Cost, by Building Size?
$1,440 per unit a year for a typical new NYC condo's building utilities
Common-area electricity, gas, heat and water per unit per year in new NYC condo budgets, by building size, from offering plan Schedule B budgets.
How Much Does It Cost to Maintain a Condo Elevator in NYC?
$5,000 a year to maintain one elevator in a typical new NYC condo budget
Elevator maintenance in new NYC condo budgets: per building, per elevator and per unit per year by building size, from offering plan Schedule B budgets.
Gas Stoves Are Disappearing From New NYC Condos
Only about 40% of NYC condo offering plans filed in 2025 specify a gas cooktop, down from over 90% before 2020. What's replacing gas, and what buyers should check.
Split System, VRF or PTAC? How Your New Condo Heats and Cools
About 9 in 10 new NYC condos now heat and cool with electric heat pumps, and nearly half bring in fresh air through an ERV. What each system means for comfort and costs.
Does Your New Condo Really Come With a Washer/Dryer?
Almost every new NYC condo has in-unit laundry, but in small buildings nearly half come with hookups only, no machines. And 6 in 10 new dryers are ventless.
Your Own Water Heater or the Building's Boiler?
Two-thirds of new NYC condo plans now put a water heater in each apartment, up from about a third before 2016. Here's what that means for space, bills and repairs.
The Walk-Up Is Back: 4 in 10 New NYC Condo Plans Have No Elevator
About 42% of NYC condo plans filed since 2023 are walk-ups, up from 15% before 2016. Where they are, why they're growing, and what you save in common charges.
Does Your New Condo Have a Reserve Fund?
About 89% of NYC condo budgets filed since 2022 include a reserve line, typically 10% of the budget, or about $50 per apartment per month. Big buildings set aside less.
The 421-a Tax Break Is Disappearing From New NYC Condos
421-a once cut property taxes in hundreds of new NYC condos. Since the program closed to new projects in 2022, condo plans claiming it have dropped by more than two-thirds. What buyers should know.
Sub-Zero or Frigidaire? What Each Price Gets You in the Kitchen
Frigidaire and GE lead in NYC condos under $1M per apartment, Bosch in the middle, and Sub-Zero, Miele and Gaggenau at $2.5M+. What 900 recent offering plans specify.
The Bathroom Brands in NYC's Priciest Condos
Which bathroom brands NYC's priciest new condos use, what really separates a luxury bath, and why the brand in the offering plan isn't guaranteed.
The NYC Luxury Condos That Sold Fastest
Which NYC luxury condo buildings sold out fastest, from offering plans and city closing records, and what a quick sellout tells you as a buyer.
Which NYC Condos Sold for More Than Their Price List?
60% of 349 buildings closed below their original Schedule A price list in total
Which NYC new condo buildings closed furthest above the sponsor's original Schedule A prices, from offering plans and city deed records, and what it means when you buy new.
How Typical NYC Condo Finishes Have Changed Since 2010
What a $1,000-$1,300/sf NYC condo comes with now vs. 2010: heat pumps, ventless dryers, electric stoves, quartz counters, and what it means for buyers.
The Appliance Brands NYC Developers Actually Pick
81% of 1,725 new-construction condo offering plans name at least one appliance brand
We read NYC condo offering plans to see which kitchen and laundry brands sponsors promise, from Bosch and Miele to Sub-Zero and Wolf, and what to check before you buy.
Who's Really Building Brooklyn's Condos?
22% of the Brooklyn plans tied to a company come from the ten most active developers
Which development companies are behind Brooklyn's new condos, where they build, and what buyers should check about a developer before signing, from the offering plans.
Who Gets the Roof? How NYC Condos Split Up Outdoor Space
Which NYC condo apartments get private terraces, gardens and roof decks, what outdoor space adds to the price, and the rules that come with it.
The Architects Behind Brooklyn's Small-Condo Boom
Who designs Brooklyn's small condo buildings? The architects named most often in boutique condo offering plans, where they build, and what their buildings cost.
What You Get in a Small NYC Condo Building
76% of new NYC condo buildings have 30 homes or fewer
Which amenities small NYC condo buildings actually include, from bike rooms to gyms and doormen, read from their offering plans, and what staff adds to common charges.
Where Do Your Common Charges Actually Go?
$32 of every $100 in common charges goes to insurance and water in a typical new NYC condo
Out of every common charges dollar in a new NYC condo, how much pays for staff, insurance, water, repairs, management and reserves, from offering plan budgets.
Small Building or Tower? What Brooklyn Buyers Pay for Each
Small Brooklyn condo buildings vs. large ones, from the offering plans and city deed records: price per square foot, home sizes, common charges, taxes and how fast they sell.
What Does Another $1,000 per Square Foot Buy in Manhattan?
2,980 sq ft typical home in the priciest group of new Manhattan condos, against 1,340 in the lowest
What a higher price per square foot buys in a new Manhattan condo: home size, bedrooms, outdoor space, common charges, staff and the brands named in the offering plans.
Do Developers Keep Hiring the Same Architects and Lawyers?
77% of developers' later projects rehired an earlier offering plan attorney, against 14% by chance
How often NYC condo developers go back to the same architect, offering plan attorney, property manager and sales team, measured across their offering plans and tested against chance.
How Much Should You Pay in Common Charges?
$740 average first-year budget per unit per month, across 518 plans accepted since Oct 13, 2021
NYC condo common charges benchmarks by borough and building size, from the first-year Schedule B budgets in recent offering plans. When low is a red flag.
What a New NYC Condo Spends in Year One
$8,800 average first-year operating budget per residential unit, across 518 recent plans
Where a new NYC condo's first-year budget goes, from recent offering plan Schedule Bs: insurance, water, staff, management and reserves, by building size.
How Long Does the AG Take to Approve a Condo Plan?
237 days average from submission to AG acceptance, across the 100 most recent plans that can be timed
How long the NY Attorney General takes to accept a NYC condo offering plan, from the most recent plans: average time, the slow quarter, and what makes a plan slow.
How Many Condo Plans Get Filed in NYC Each Year?
682 NYC plans accepted in 2006, the busiest year on record
How many NYC condo offering plans has the NY Attorney General accepted each year? Counts by year, borough and construction type from The Condo Book Project's plan records, updated with every rebuild.
The Data Behind It
- New Development Pipeline
- Offering Plan Timelines
- Common Charge Benchmarks
- Property Tax Benchmarks
- Operating Expense Benchmarks
- Price per Square Foot
- Unit Size Benchmarks
Guides
New to offering plans? The guides explain how to find a plan, read its schedules and follow its amendments.