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Contact Information:


Housing & Community


5320 Palmer Lane, Suite 1A

Williamsburg, VA 23188

P: 757-259-5340

F: 757-220-0640



Hours of Operation


8 a.m. - 5 p.m.


Virginia’s Fair Housing Law


EHO logoVirginia’s fair housing law prohibits discrimination on the basis of race, color, religion, national origin, sex, elderliness, familial status, and handicap.   For more information, click here!


Prescriptive measures


The HELP program uses a “Prescriptive Measures” worksheet to list improvements recommended for each home. Improvements are assigned a value based on REM/Rate software calculations compiled from over 200 homes to determine approximate cost savings for homes participating in the HELP program. The software calculates heating, cooling, hot water, lighting, and appliance energy loads. Homes scoring at least 100 points on the worksheet are estimated to realize at least a 20 percent reduction in energy usage for heating and cooling.

Prescriptive Path:



The Prescriptive Path sheet is a comprehensive, still simple option to calculate energy efficiency improvement for residential structures.  It was created for retrofit programs based on averaging energy modeling calculations.

The Prescriptive Path utilizes the most common energy efficiency retrofit measures in James City County.   It was created utilizing climate information from the Richmond, VA region.


SENCON, a local energy consulting firm, utilized its experience in providing energy modeling and improvement analysis services for homeowners, banks, contractors, Public Housing Authorities, and Regional Alliances completing energy efficiency retrofits.  Data was gathered from over 100 energy models that were created for residential homes consisting of 1 and 2 stories during 2011.  The energy modeling software utilized is REM/Rate.


The Prescriptive Path sheet was created for 1 and 2 story houses.  In those sheets, each retrofit mandatory measure has a pre-established number (See “Available Points”).  This number is a representation of the efficiency gained by each measure, i.e., the bigger the number, the more efficient the measure. 

In an energy efficient retrofit project, a projection of energy savings can be achieved by adding the “Available Points” for each measure.  Applicable points are entered for each measure in the column on the right and they are added to come up with a value for the retrofit.

In order to estimate a projection of 20 percentefficiency savings for a retrofit, the retrofit should achieve 100 points from the “Mandatory Measures” section.

You can also check out EPA’s Household Emissions Calculator, by clicking the link below, and estimate your current household emissions, find out how you can reduce your household emissions, and how much you can save.


Click on image to enlarge

The Prescriptive Path sheet (pictured on the left) is a comprehensive, still simple option to calculate energy efficiency improvement for residential structures. Click here to download the Prescriptive Measures Spreadsheet >>>


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