2 - Town of Colchester

Density Definition
Residential density is simply
another way of looking at
development yield. For
example, seven lots on a 20-
acre parcel is the same as a
density of 0.35 units per acre.
Density is used to regulate
development yield from a
piece of property.
Density Standards
Prior to adoption, density
standards should be:
• compared to actual
development experience
in Colchester, and
• be reviewed to ensure
design flexibility.
It will be important to:
• place a note on
approved subdivisions
that certain oversize lots
cannot be further
subdivided if the
maximum density for
the parcel has been
reached, and
• preserve a set of
assessor maps that show
the configuration of
property at the time the
residential density
regulation was adopted.
The recommended program for encouraging open space development patterns includes:
• modifying the definition of buildable land to delete the word “contiguous” but to include floodplain areas,
• using a density regulation rather than a minimum lot area requirement to regulate development yield (limit
the total number of lots on a parcel being subdivided),
• maintaining the requirement for a certain shape and minimum area of contiguous buildable land on a lot but
reducing the minimum lot area requirements,
• requiring a specific percentage of the parcel area be preserved as open space, and
• providing flexibility in minimum lot size requirements within acceptable Health Code standards.
Since the maximum yield (number of lots) is determined by the density regulation, the regulatory review process then
focuses on determining the best overall plan for the development and conservation of the parcel. The resulting
development pattern will help preserve natural resources, be compatible with the neighborhood, promote an open space
system, and protect the character of the community.
By using residential density to regulate the number of lots and by allowing smaller lot sizes, more of a parcel can be
preserved as open space. This open space can be located on a parcel to conserve sensitive natural resources, buffer
adjacent uses, protect scenic views, and contribute to the overall open space pattern in Colchester.
In addition, the residential density regulation can be used to “tune” the amount of future residential development in
Colchester.
An open space development program will not result in any additional lots being built on a particular parcel, but it will
encourage development patterns that are more in keeping with people’s perception of, and desires for, Colchester. The
Commission should also consider allowing other flexible development types that preserve meaningful open space.
Possible regulatory language could be as indicated on the facing page.
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