New development purchases in Manhattan involve enough structural differences from resale transactions that buyers who approach them without specific preparation consistently make expensive mistakes. These are not obscure technical errors that only legal experts catch. They are predictable, well-documented patterns that show up repeatedly in the new development market and that cost buyers real money, real time, or real disappointment.
The good news is that every mistake covered in this article is preventable. None of them require unusual expertise to avoid. They require understanding how the new development market actually works rather than assuming it works like a conventional resale purchase, and then applying that understanding at the right moments in the process.
This article covers the most consequential mistakes buyers make in Manhattan new development and exactly what to do instead.
For broader context on navigating new development purchases, see our Manhattan New Development Buyer’s Guide.
Mistake One: Using the Developer’s Attorney
This is the single most common and most consequential mistake in the Manhattan new development market. Buyers who are excited about a building walk into the sales gallery, fall in love with the unit, and when the sales agent offers to connect them with the building’s preferred attorney, they say yes.
The developer’s attorney represents the developer. Their job is to close the transaction efficiently on terms that protect the developer’s interests. They are not adversarial toward buyers in any personal sense, but they are structurally positioned to serve the party paying them, which is not you.
A competent, independent New York real estate attorney reviewing the offering plan on a buyer’s behalf can catch substitution provisions that allow the developer to swap out specified materials for less expensive alternatives, identify the developer’s conditions for extending delivery deadlines without triggering a buyer’s exit right, flag pending assessments or litigation involving the building or the sponsor, review common charge budget projections for accuracy and identify introductory budgets likely to increase, and negotiate contract terms including concessions, closing cost responsibility, and protective provisions.
New York State law requires buyers to have an attorney in a real estate transaction. Get an independent one with specific experience in Manhattan new development. The attorney fee, typically $2,500 to $5,000, is one of the most valuable dollars in a seven-figure transaction.
Mistake Two: Not Reading the Offering Plan
The offering plan is the developer’s legally binding commitment to the buyer. It is also typically several hundred pages long, which is why most buyers either skip it entirely or skim it superficially. This is a significant mistake.
The offering plan contains the information that matters most to your purchase decision and that is never prominently featured in the marketing materials. It includes the developer’s substitution rights, the provisions governing what changes the developer can make to the building’s specifications without buyer consent. It includes the conditions under which the developer can delay delivery and how long they can extend before buyers gain the right to exit. It includes the common charge budget projections and the specific language governing when and by how much those budgets can increase. It includes any pending litigation involving the sponsor or the building. It includes the precise description of what you are buying and what the common elements are.
Your attorney should review the offering plan thoroughly. But you should also read the sections that matter most to your specific situation, particularly the unit description, the substitution provisions, the delivery timeline and conditions, and the common charge budget. Buyers who discover after closing that the marble countertops in the rendering were substituted for a different material, or that the common charges increased 25 percent in year two because the introductory budget was designed to look attractive rather than to be sustainable, are buyers who did not read the offering plan carefully enough.
Mistake Three: Underestimating Closing Costs
The closing costs on a new development condo in Manhattan are substantially higher than most buyers expect, and they are higher than what buyers pay on resale transactions. The difference matters enough to change the investment math on a purchase.
In a resale condo transaction in Manhattan, total buyer closing costs typically run 3 to 5 percent of the purchase price. In a new development condo transaction, total buyer closing costs commonly run 5 to 8 percent, and sometimes higher. The primary driver of the difference is that in new development, the buyer typically pays the transfer taxes that in a resale transaction are paid by the seller. The combined NYC and NYS transfer taxes run approximately 1.825 to 2.075 percent of the purchase price. On a $2 million new development purchase, that is approximately $36,500 to $41,500 that resale buyers do not pay.
Additional new development-specific costs include a working capital contribution of typically two months of common charges, a resident manager unit contribution at some buildings, and the sponsor’s attorney fees at some buildings. On a $2 million new development purchase, the total closing costs can easily reach $120,000 to $160,000. Buyers who budget based on resale comparable cost structures will find themselves short at the closing table.
The most important action is to have your attorney itemize the full closing cost exposure before you sign a contract, not after. And the most valuable negotiation with the developer is getting them to cover the transfer taxes, which as noted in our separate article on concessions is the most commonly available and most standard concession in the market.
Mistake Four: Treating the Closing Date as Fixed
Manhattan new development closings almost never happen on the date the developer initially projects. Construction delays from permitting, material supply, and labor availability are standard. Certificate of occupancy issuance by the NYC Department of Buildings can be delayed. The coordination between building systems inspections and final CO issuance frequently takes longer than projected.
Buyers who plan their lives around the developer’s estimated closing date, including terminating leases, scheduling movers, or making plans that depend on being in the new apartment by a specific date, consistently find themselves scrambling. The most common outcome is that the initial delivery estimate is accurate in rough order of magnitude but not in specific timing. A building projected to close in Q4 of one year might close in Q2 or Q3 of the following year.
The practical approach is to treat the developer’s closing estimate as a rough directional indicator, not a commitment. Keep your housing flexibility until you have received the formal closing notice, which typically comes 30 days before the actual closing date. Do not terminate a lease, make a competing purchase, or commit to any date-sensitive plan until you have the formal notice. Buyers who understood this in advance sleep through the delays; buyers who planned around the developer’s initial projections experience them as crises.
Mistake Five: Not Vetting the Developer
The developer of a Manhattan new development is not simply the entity that built the building. They also typically remain involved in building management during the transition period before the condominium association takes over, they carry a sponsor unit inventory that they will be selling or renting for years after most buyers close, and they have made representations in the offering plan that they are contractually obligated to fulfill.
A developer with a strong track record of delivering on their representations, maintaining buildings professionally during the transition period, and honoring their commitments to buyers is a genuinely different ownership experience from a developer with a history of disputes, assessments, and management quality issues.
Before signing a contract in any Manhattan new development building, buyers should research the developer’s past projects. Visit two or three of their previous buildings and ask residents about their experience. Search for litigation history involving the developer. Review any news coverage of issues at previous developments. Ask your attorney about the developer’s reputation and history specifically in the context of new development residential projects.
Developers who build to a high standard and who care about their reputation will make good on small punch list items and construction quality issues that arise after closing. Developers who do not will leave buyers navigating construction defects alone. The offering plan gives you limited practical recourse once you have closed and discovered a problem. The best protection is choosing a developer whose track record justifies confidence before you sign.
Mistake Six: Ignoring the Common Charge Budget
New development buildings launch with introductory common charge budgets that are specifically designed to be attractive during the marketing and sales period. These budgets are projections for a building that has not yet operated, and they are frequently set optimistically rather than conservatively. Once the building has been running for a year or two and the actual operating costs are established, common charge increases of 10 to 30 percent or more in years one and two are not uncommon.
Buyers who evaluate the affordability of a new development unit based on the introductory common charge level without modeling a 15 to 25 percent increase in years one and two are underestimating their carrying costs. The offering plan will specify the conditions under which common charges can be increased and by how much without a vote of the unit owners. Your attorney should flag this language and help you model the realistic range of common charges in years two through five.
Mistake Seven: Not Getting an Independent Unit Inspection
Before closing on a new development unit, buyers have the right to conduct a walkthrough inspection. This inspection, sometimes called a punch list walkthrough, is the buyer’s opportunity to identify construction defects, incomplete work, and items that do not match the offering plan specifications before closing.
Many buyers treat this walkthrough as a formality, moving through it quickly and noting only the obvious issues. The buyers who benefit most from the walkthrough process take it seriously, bring a contractor or building inspector with experience in new construction, and document everything systematically. Items that are identified before closing can be required to be corrected by the sponsor. Items discovered after closing require the buyer to pursue the sponsor through the warranty and dispute resolution process in the offering plan, which is typically slower and less certain than pre-closing correction.
Common issues that a thorough pre-closing inspection catches include improper window and door sealing, HVAC system calibration problems, plumbing connections that have not been pressure-tested, flooring installation defects, and electrical outlets or fixtures that have not been correctly installed. None of these are catastrophic individually, but collectively they represent the kind of quality assurance that new development buyers pay a premium to avoid and that a careful inspection can catch before it becomes a post-closing dispute.
Mistake Eight: Choosing Floor and Unit Solely on Visual Appeal
New development sales galleries are designed to sell the dream. The renderings are stunning, the finishes are immaculate, and the model units are dressed by professional stagers. Buyers who choose their units primarily based on visual appeal without thinking systematically about orientation, floor plate, view permanence, and the building’s internal unit dynamics consistently discover later that the unit they chose has problems they could have anticipated.
East-facing units lose the afternoon and evening light that west-facing units have. Low-floor units that appear to have views will lose those views if a neighboring parcel is developed. Corner units with multiple exposures are almost always more desirable than interior units with a single exposure, even though they may cost more. Buildings with many units per floor have lobby congestion at peak times that buyers who toured on a quiet weekday afternoon did not experience. Elevator wait times, shared terrace competition, and noise transmission from mechanical systems are all unit-selection factors that matter to daily life but are almost never visible in the sales gallery.
Before choosing a unit, buyers should visit the building at multiple times of day and week if the construction stage permits. Study the floor plans carefully for the distribution of windows, the proximity to mechanical spaces, and the distance from the elevator core. Research the development rights on neighboring parcels to assess view permanence. The extra time spent on this analysis before contract signing consistently produces better long-term satisfaction than choosing based on the sales gallery experience alone.
Seller Perspective
For sellers in new development buildings in 2026, the mistakes that buyers commonly make have a direct implication for your listing. Buyers who are well-prepared and who have done their research will ask good questions about common charges, the developer’s history, and the building’s first-year operating experience. Sellers who can answer those questions accurately and provide building financial documentation readily will close faster and at stronger prices than sellers who are unprepared for informed buyer diligence.
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Frequently Asked Questions
The most consequential mistakes buyers make in Manhattan new development are using the developer’s attorney instead of an independent one, failing to read the offering plan thoroughly before signing a contract, underestimating closing costs which often run 5 to 8 percent versus 3 to 5 percent for resale due to the buyer absorbing transfer taxes, treating the developer’s closing date estimate as a firm commitment rather than a projection, not vetting the developer’s track record at prior projects, ignoring the common charge budget trajectory and not modeling year two and three increases, skipping a thorough pre-closing walkthrough inspection, and choosing units based on sales gallery aesthetics without researching view permanence, orientation, and floor plate dynamics.
An offering plan is the developer’s legally binding commitment to buyers in a New York City condo development. It is filed with and approved by the New York State Attorney General’s office and typically runs several hundred pages. The offering plan describes every aspect of the building and the individual units including specifications, finishes, the common charge budget projections, the conditions governing delivery timelines and developer delays, the developer’s substitution rights allowing changes to specified materials, the governance structure of the building and the condominium association, and the legal terms governing the purchase. Buyers should have an independent real estate attorney with new development experience review the offering plan thoroughly before signing a purchase contract. The offering plan can be requested from the sales office at any point in the purchase process.
Closing costs on new development condos in Manhattan typically run 5 to 8 percent of the purchase price, meaningfully higher than the 3 to 5 percent typical of resale transactions. The primary driver of the higher cost is that buyers in new development typically pay the NYC and NYS transfer taxes that sellers pay in resale transactions, totaling approximately 1.825 to 2.075 percent of the purchase price. On a $2 million new development purchase, transfer taxes alone add approximately $36,500 to $41,500 to buyer closing costs. Additional new development-specific costs include working capital contributions, resident manager unit contributions at some buildings, sponsor attorney fees at some buildings, the mortgage recording tax on financed purchases, and the mansion tax on purchases above $1 million.
To vet a Manhattan new development developer before purchasing, review their track record by researching and if possible visiting two or three of their previous completed buildings. Ask current residents about their experience with the developer during and after the transition period. Search for litigation history involving the developer’s name and the LLC entities used for previous projects, which will be listed in the offering plan. Review any news coverage of problems at previous developments. Ask your independent real estate attorney about the developer’s reputation specifically in the context of residential new development in Manhattan. A developer who has consistently delivered on their representations and maintained buildings professionally during the transition period is a meaningful positive signal.
Yes, and they frequently do. New development buildings launch with introductory common charge budgets that are specifically designed to be attractive during the marketing and sales period. Once the building has been operating for a year or two and actual costs are established, common charge increases of 10 to 30 percent in years one through three are not uncommon. The offering plan specifies the conditions under which common charges can be raised and the process required. Buyers should have their attorney review these provisions and model a realistic range of carrying costs in years two through five rather than budgeting based on the introductory level. A building whose introductory common charges look unusually low compared to comparable buildings in the neighborhood is often a signal that year one increases are likely.
