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IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 99-4218879

BUILT BUILDINGS LAB INC

Tax-exempt · BOSTON, MA 02131

Financials

$165K$28K2024$200K$233K2025
Revenue Expenses · by fiscal year end
Financials of BUILT BUILDINGS LAB INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990-EZ$199,668$233,178-$33,510$106,566$13,782$92,784
December 31, 2024990-EZ$164,768$28,044$136,724$139,474$2,750$136,724
Financial details: 990-EZ for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$138,841
Program service revenue
$56,343
Investment income
$2,643
Other revenue
$1,841

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$98,583
Salaries, compensation and benefits (total)
$170,350
Professional fees and payments to contractors
$42,216
Printing, publications and postage
$27
Other expenses
$20,585
Program services (functional)
$160,789

Balance sheet and other

Total assets, start of year
$139,474
Total assets, end of year
$106,566
Total liabilities, end of year
$13,782
Net assets, end of year
$92,784
Cash, savings and investments
$87,065
Gross receipts
$199,668

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990-EZ for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
Lori MinsterExecutive Director President Clerk Director20$81,250
Billie FairclothResearch Director Treasurer Director4$17,333
Nakita ReedDirector0$0
Larry StrainDirector0$0
Julianne PolancoDirector0$0
990-EZ for the year ended December 31, 2024: 5 people
NameTitleHours / weekCompensation
Lori MinsterExecutive Director President Clerk Director20$18
Billie FairclothResearch Director Treasurer Director4$3
Nakita ReedDirector0$0
Larry StrainDirector0$0
Julianne PolancoDirector0$0

Address and contacts

Address (IRS master file)
10 ARDALE ST, BOSTON, MA 02131-1506
Signed the 990-EZ
Lori Minster, President
Phone
(000) 000-0000

Mission

Built Buildings Lab Inc is an educational and scientific green initiative organization organized and operated to conduct research and disseminate knowledge to the public regarding existing buildings and their use and importance as climate change mitigation and adaptation solutions The Organization believes that existing buildings are a significant responsibility and resource for global sustainability and by taking care of them community leaders and building owners can steer the future fabric of resilient healthy and equitable communities The Organization engaged in studies analyses assessments and projects around architectural design research and sustainability services to help community-based organizations building owners city governments and other organizations understand maintain and integrate existing buildings into strategic sustainability and climate action plans

990-EZ for the year ended December 31, 2025

Program accomplishments

  • The organizations primary program Decarbonizing the Built Environment Through Heritage DBTH advances climate action by integrating cultural heritagebased strategies into building decarbonization policy and practice During the year the organization expanded this multi-year initiative through research advisory work and stakeholder engagement focused on positioning existing buildings as climate solutions Activities included developing policy frameworks convening nonprofit and community partners and supporting collaboration across practitioners policymakers and advocacy organizations The organization also contributed to international climate discourse through participation in global convenings including representation at COP30 and Climate Week events where it advanced the role of existing buildings and heritage-based approaches within broader climate policy conversations Through this work the organization is helping to shift how existing buildings are understood and used in climate policy moving from a niche concern to a practical scalable strategy for reducing emissions and supporting resilient community-driven outcomes
    Expenses $103,072 · grants $42,976
  • The organization advanced development of the CARE Tool Carbon Avoided Retrofit Estimator an online resource that supports community leaders heritage advocates building owners educators and designers in evaluating strategies to reduce whole life carbon through building reuse and retrofit The tool enables users to estimate and compare the embodied operational and avoided carbon impacts of reuse versus new construction supporting early decision-making During the year the organization expanded the tool to allow users to save and manage portfolios of projects improving its usefulness across multiple buildings and over time The CARE Tool is free and publicly accessible ensuring broad access to practical data-informed guidance for decarbonization Through this work the organization is increasing access to actionable tools that support wider adoption of reuse and retrofit as scalable climate strategies
    Expenses $10,852 · grants $24,000
  • The organization contributed to applied research and publications with the Urban Land Institute ULI including Whats Old Is New The Business Case for Urban Adaptive Reuse and The Whole Life Carbon of Commercial to Residential Conversions Aligning the Climate and Housing Imperative This work advances strategies to accelerate adaptive reuse in commercial real estate to achieve co-benefits of urban revitalization housing development community preservation and climate action The research demonstrates how converting existing buildings can reduce carbon emissions while addressing housing shortages and vacancy challenges supporting alignment between climate goals and real estate decision-making Findings were disseminated through public webinars industry events and presentations including Climate Week NYC helping to translate technical economic and policy insights into accessible guidance for developers policymakers and community leaders Both reports are available free of charge Through these efforts the organization is supporting broader adoption of adaptive reuse as a viable and scalable development strategy
    Expenses $46,865 · grants $59,250

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990-EZ on file
2024December 31, 2024May 15, 2025990-EZ on file
2023December 31, 2023May 15, 2024Check at the IRS

File the 2026 990-EZ for BUILT BUILDINGS LAB INC

Due May 17, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
99-4218879
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2024
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C99)
Assets (IRS master file)
$106,566
Income (IRS master file)
$199,668

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-EZDecember 2025$199,668$233,178$106,566IRS
990-EZDecember 2024$164,768$28,044$139,474IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 99-4218879).

Questions about BUILT BUILDINGS LAB INC

What is the EIN of BUILT BUILDINGS LAB INC?
The employer identification number (EIN) of BUILT BUILDINGS LAB INC is 99-4218879.
Is BUILT BUILDINGS LAB INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2024.
Are donations to BUILT BUILDINGS LAB INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does BUILT BUILDINGS LAB INC file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of BUILT BUILDINGS LAB INC due?
The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did BUILT BUILDINGS LAB INC last file with the IRS?
The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
Who are the officers and directors of BUILT BUILDINGS LAB INC?
The 990-EZ for the year ended December 31, 2025 lists 5 people; 2 received compensation from the organization, the highest $81,250 (Lori Minster, Executive Director President Clerk Director).
How much revenue does BUILT BUILDINGS LAB INC have?
On its 990-EZ for the year ended December 31, 2025 it reported revenue of $199,668, expenses of $233,178 and total assets of $106,566 at year end.

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