For NYC owners, asset managers and compliance teams
LL97 Compliance and Decarbonization Software for NYC Real Estate Portfolios
Know what LL97 will cost every building in your portfolio. Get an AI-assisted retrofit plan that shows which upgrades to make, what they cost and what they save.
Estimate from the public 2024 LL84 filing, not a compliance determination.
About 1 in 10 reporting NYC buildings is over its limit today. From 2030, it is about 6 in 10.
- $268
- per excess ton, every year
The gross penalty under Article 320 for each metric ton of CO₂e over the limit, before deductions, adjustments and alternative compliance pathways.
- 65%
- lower office limit from 2030
The office limit falls from 7.58 to 2.691 kgCO₂e/ft² in 2030 and reaches zero in 2050. Energy coefficients change too, so each period needs its own comparison.
- 26,783
- 2024 filings analyzed
Single-building LL84 disclosures behind the 6-in-10 figure: what each building would emit against its 2030–34 limit at today’s energy use.
From a street address to a plan you can budget for
- 1
Look up any building
Type a street address. We find the building in the city's records and pull its latest energy benchmarking filings, its lot details and whether Local Law 97 covers it. No spreadsheets to fill in first.
- 2
See its fines, period by period
We calculate the building's emissions limit for every compliance period from 2024 to 2050 and compare it with its actual emissions, so you can see whether it is under the limit today, when it goes over, and what that would cost each year.
- 3
Rank your portfolio
Add buildings to a portfolio, or import a spreadsheet of addresses. Every building is ranked by estimated exposure, so you know which ones to deal with first and how far each has to cut.
- 4
Get a retrofit plan
Open any building in the retrofit planner for a costed set of upgrades, in the order to do them, that brings it under its limit at the lowest long-term cost. AI insights explain why each step is there.
A costed retrofit plan for every building, not just a fine
Knowing a building is over its limit is the start. The planner shows what to do about it: which upgrades to make, roughly what they cost, and how far each one brings the building towards its 2030 limit.
The right upgrades, in the right order
From retro-commissioning and LED lighting to boiler controls, steam traps and heat pumps. The planner compares every combination and recommends the one that clears the limit at the lowest cost over 15 years, fines included.
Costs, savings and fines avoided
Each step shows a cost range, yearly energy savings, the tons of carbon it cuts and the fines it avoids. Steps that cost far more than the fines they prevent are flagged, so you can decide when to make them.
Refined with what you know
Start from public records, then add your own utility bills, equipment details or audit findings. Rule out upgrades that do not suit the building and the plan recalculates. Matching rebates and financing are listed, and any plan can be saved as a printable report.
1.18M sf hotel, plan to its 2030–34 limit
Start by validating operating conditions and addressing gas-driven emissions through the proposed tune-ups and distribution measures; the modeled package reaches the 2030–34 limit, but depends on confirming building-specific conditions.
1
Retro-commission HVAC and controlsCosts $176k–$706k, saves $337k/yr−447 t/yrThe hotel’s reported energy use is above the NYC hotel peer median, and natural gas drives most emissions on the 2030 basis, so verify occupied hours, control sequences, and trend logs to find operational waste. Use that review to set commissioning scope and confirm the modeled plan’s assumptions; the public filing passed plausibility checks but is not a utility bill.
2
Upgrade heating controls and tune the boilerCosts $141k–$353k, saves $29k/yr−123 t/yrNatural gas is the largest emissions source on the 2030 basis, making heating operation especially relevant; check existing controls, overheating complaints, and boiler condition with an engineer. Those findings inform whether and how to tune the plant, whose fuel and performance assumptions should be verified against building records.
3
Insulate heating distributionCosts $94k–$235k, saves $12k/yr−53 t/yrBecause gas drives most reported emissions, check exposed heating and steam distribution for insulation condition during a walkthrough. The observed pipe extent and condition will determine whether this measure belongs in the hotel’s plan and what work to scope.
4
Optimise building automation and fan/pump speed controlCosts $882k–$2.9M, saves $216k/yr−173 t/yrThe hotel’s above-median energy use and gas-led emissions make central fan, pump, and heating controls worth investigating alongside operational tuning. Inventory fans and pumps, existing drives, and the controls platform to decide whether this scope is applicable and avoid duplicating existing capabilities.
5
Upgrade to LED lighting with controlsCosts $1.2M–$2.9M, saves $160k/yr−86 t/yrElectricity accounts for a substantial part of site energy, though natural gas leads 2030-basis emissions, so lighting can complement the gas-focused measures. Survey fixtures, the share already LED, and operating hours to establish the remaining scope and inform the lighting choice.
Plan total $2.5M–$7.2M, saving about $754k a year in energy.
- Today
- 5,256 t
- 2030–34 limit
- 4,530 t
- 726 t over
- After the plan
- 4,374 t
- 156 t under
Every building in the portfolio, ranked by what is at stake
Ordered by estimated 2030 fines, with the risk spread and all five compliance periods at a glance. Sort, filter by risk band, and export to CSV for the capital plan.
| Building | Band | Est. 2030 exposure | Reduction needed |
|---|---|---|---|
| 1180 Sixth Avenue | Critical | $301,774 | 52% |
| 77 Water Street | Critical | $298,268 | 43% |
| 220 Water Street | High | $27,652 | 11% |
| 455 Madison Avenue | Watch | $0 | — |
| 625 Fulton Street | Low | $0 | — |
Illustrative figures. Your portfolio renders from live filings.
Building detail
Energy use year by year, how it compares with similar NYC buildings, and the limit calculation shown in full, including which uses of the building set it.
Confidence, stated
Every estimate shows how complete the data behind it is. When a public filing is missing or looks wrong, we say so instead of presenting a number you cannot rely on.
AI insights that tell you where to start, and why
BuildingVista turns filings, limits and upgrade plans into a short brief you can share with owners and boards: where to start, why, and what needs checking before anyone spends money.
A brief for the whole portfolio
Which buildings to look at first and why, with the first step for each, and filing problems or data gaps flagged beside them rather than hidden.
Every upgrade comes with its reasoning
Each step in a building's plan comes with the reasoning behind it: how the building compares with NYC peers, which fuel drives its emissions, and what to check on site before committing.
Every figure is calculated, never generated
The AI writes the explanation only. Costs, savings and fines come from the calculation engine, and every response is checked against it before you see it.
Start with the largest exposure, and confirm operating schedules before choosing capital work.
First step: Start with operating schedules and controls
The portfolio's largest estimated exposure. Energy use sits well above similar NYC offices and electricity drives most emissions on the 2030 basis, so review schedules and setpoints before pricing equipment.
Public records, cited by name and reporting year
Every figure traces back to a named city dataset and the year it was filed. Official certification and filing remain with your Registered Design Professional.
- LL84 Benchmarking
- Annual energy and water disclosure for buildings over 25,000 sf
- LL97 Covered Buildings
- The city's own list of which properties the law applies to
- PLUTO
- Lot geometry, floor area, building class and year built
- NYC GeoClient & GeoSearch
- Matching an address to the city's lot and building identifiers
- LL97 Emissions Factors
- Official limits and emissions coefficients for each building use
- Retrofit references
- Savings and cost assumptions sourced from LBNL, the US DOE, EIA and NEEP
Common questions
Is this an official compliance determination?
No. Everything here is estimated from public data and is meant for planning and triage. Before you file, verify with NYC DOB and a qualified Registered Design Professional. We show the confidence level on every estimate so you know how much weight it can carry.
Who is BuildingVista for?
Building managers, portfolio and asset managers, owners and co-op or condo boards with NYC buildings over 25,000 sf, and the consultants who advise them. It is for anyone who needs to understand a building's LL97 position and decide what to do about it.
How does the retrofit planner choose upgrades?
It starts from the building's own energy filing and type, estimates what each upgrade would save, and compares every combination to find the one that meets the emissions limit at the lowest cost over 15 years, counting fines avoided and energy saved. You can add your own bills and equipment details, or rule out upgrades, and the plan recalculates.
How accurate are the cost estimates?
They are planning ranges for budgeting and comparing options, based on published industry references and NYC prices, not contractor quotes. Use them to decide what to study first, then confirm scope and cost with an engineer before committing capital.
How do the AI insights work, and can I trust them?
The calculation engine ranks your buildings and works out every figure first: exposure, budgets, savings and data gaps. The AI then explains those results in clear, readable language. It is not allowed to invent numbers, equipment or eligibility, and each response is checked against the evidence before it is shown; anything that fails is replaced with calculated guidance. Treat the insights as a starting brief to verify, not a compliance determination.
What if a building has never filed a benchmarking disclosure?
We flag it separately rather than folding it into an unknown bucket. A covered building with no disclosure is its own compliance problem, and it is usually the first thing worth fixing in a portfolio.
Which buildings does Local Law 97 cover?
Broadly, buildings over 25,000 sf, two or more buildings on the same lot totalling over 50,000 sf, and condominium groups governed by the same board over 50,000 sf. We check each address against the city's own covered-buildings list.
How current is the data?
Benchmarking disclosures publish annually and lag by about a year, which is the same lag the city works from. Every figure in the app is labelled with its reporting year, and the data sources page shows when each dataset was last synced.
Can I import a portfolio I already track in a spreadsheet?
Yes. Upload a CSV of addresses or BBLs and we resolve them in bulk, telling you which rows matched, which were ambiguous, and which are not covered by the law.
See where your portfolio stands before 2030
Enter an address to see a building’s emissions limits, estimated fines and a costed plan to bring them down. Free during the pilot, no card required.