Green Building Regulations

Green building is an approach to the design, construction, and operation of buildings that aims to reduce or eliminate the negative environmental impacts of buildings while promoting occupant health and productivity. Rockville’s green building regulations apply to new construction and renovations of both residential and commercial buildings. Project applicants should start preparing their green building application as early in the design process as possible.

Requirements and verification methods differ by project type. For all project types, a Green Requirements Supplemental Form and supporting documentation will be required with each planning permit and building permit, unless otherwise stated. Provide all supplemental information to verify compliance with project requirements and electives. If the information is provided on the construction documents, indicate which sheets demonstrate compliance.

Alternative methods of compliance, such as other rating systems or building codes, may be utilized, provided they are equivalent in spirit and stringency to the rating system, code, or program referenced. The applicant must demonstrate equivalency to the city and develop acceptable compliance documentation. Certification/verification under alternative compliance paths is the easiest means of demonstrating compliance but is not expressly required.

Residential Green Building Requirements

Residential projects involve the construction or modification to single-family dwellings, including detached homes, townhouses, and duplexes.

Residential green building requirements apply to all new home construction regulated by the International Residential Code (one- and two-family dwellings and townhouses three stories or less above grade plane) and substantial reconstruction projects as defined in Section R202 of Chapter 5, Article VI of the Rockville City Code.

Construction documents must demonstrate compliance with all mandatory provisions and selected electives to meet the silver performance level, as outlined in Table 303 of the NGBS.

Prior to final occupancy, builders must provide the homeowner or occupant with a manual describing the intent, benefits, use, and maintenance of green building features. The applicant must also provide any additional documentation required to verify compliance.

Commercial Green Building Requirements

Commercial projects encompass construction projects involving commercial structures, such as office buildings, warehouses, restaurants, hotels, retail stores, banks, and community centers. Multifamily residential structures, such as apartment buildings, are also considered commercial structures.

Commercial green building requirements apply to new commercial or multifamily residential buildings, additions greater than 7,500 gross square feet, and alterations of more than 50% of gross square feet (where the work area is at least 7,500 gross square feet).

Prior to final occupancy, the applicant must provide any additional documentation required to verify compliance.