Koolhof Earth relies on contributions from individuals, corporations and foundations to support our work in communities throughout Maryland. All donations are tax-deductible and your contribution will be put to work immediately to reduce environmental impact. We are 501(c)(3) organization so 100% of your donation is tax- deductible as a charitable contribution.


Koolhof Earth projects are identified and carried out in communities where environmental retrofit needs are great and charitable contributions can effectively reduce environmental impact.

  • Holistic Environmental Impact and Retrofit (HEIR) assessments.
  • Energy audits and retrofits.
  • Water efficiency audits and retrofits.
  • Stormwater retrofits.
  • Materials recycling programs.

So, here are a few examples of how your donation will be put to work:

Order Online

$10 buys supplies for annual stream cleanup activities.
$25 buys a native plant for a rain garden installation.
$25 buys a water saving faucet retrofit to reduce potable water demand.
$50 buys a package of energy efficient light bulbs
$200 buys all the native plants for a single rain garden retrofit.
$250 buys an installed programmable thermostat.
$300 buys a planted native tree.
$1000 buys a small rain garden.
$2500 can buy a comprehensive HEIR assessment of an old building that defines, values and prioritizes environmental retrofits needed to reduce environmental impact.


To donate to Koolhof Earth by mail, please send a check or money order to:

Koolhof Earth, Inc.
1316 Edna Road
Pasadena, MD 21122

Special Donations

Memorials and Honoraria

Are you interested in making a gift in the name of a loved one? Such gifts are easy to do and are a lasting and memorable way to honor a loved one or colleague. Please contact Allan Straughan at 240-401-6799 or at for more information.

Matched Gift

Some companies offer matching gift programs to encourage employees to contribute to charitable organizations. Some provide matching funds to support employee volunteer hours or match contributions dollar for dollar. If your employer requires an Employer Identification Number (EIN) please use 27-0838831. Please send your completed Match Gift Forms to:

Koolhof Earth, Inc.
1316 Edna Road
Pasadena, MD 21122

Gift of Stock

Donors can also make contributions of stock and other securities to Koolhof Earth. Such gifts support the environment and are also completely tax deductible. Contact Allan Straughan for more information at at 240.401.6799 or at for more information.


Koolhof Earth relies on volunteers to help us identify projects, seek grant funding, and execute projects.

To become a volunteer, please click to send an email expressing your interest.


Koolhof Earth partners with secular and religious nonprofit entities to leverage funding and talent to accomplish our mission including:

Blue Water Baltimore
Restore Rock Creek
Habitat for Humanity of the Chesapeake
USGBC Maryland
THE ASSOCIATED Jewish Charities
Greater Pasadena Council
Watershed Stewards Academy (WSA)
Anne Arundel Patapsco River Alliance (AAPRA)
Interfaith Partnership for the Chesapeake (IPC)
Emmanuel Monastery

To become a partner, please click to send an email expressing your interest.