Planning board approves 14-unit Elm City Commons with conditions on sewer study, foundations and vibration monitoring

The Keene Planning Board voted to approve PB-26-12, Elm City Commons, a proposed cottage-court development totaling 14 units on four merged parcels on Elm and Carroll streets, with multiple precedent and subsequent conditions intended to protect nearby homes and city infrastructure.

John Noonan of Fieldstone Land Consultants, speaking for owner Nuevo Transfers LLC, told the board the design was revised so the 32-foot gable ends face the street, with added street-facing doors and vertically aligned windows "to mimic more of a residential style in the neighborhood." Noonan said the project team studied alternate orientations but chose the current layout to minimize impervious area and to maximize room for stormwater management; he said alternative layouts would have increased pavement by about "20%" and required more stormwater practices.

Noonan also described a geotechnical constraint that raised project costs: a soils report showed refusal at roughly 40 to 42 feet, pushing the applicant to consider deep foundations such as driven steel piles, large helical coils with grade beams, or geopiers. He said the developer estimates roughly a $400,000 increase in foundation costs and that maintaining 14 units helps spread that expense across additional units.

City staff and the city engineer told the board the drainage design meets city standards and that water pressure would be maintained by looping the water line between the two streets. Sewer capacity remained an open issue: planner Megan Fortson recommended a precedent condition requiring a sewer flow study to demonstrate adequate capacity, and the board added a subsequent condition that the applicant would pay to upgrade the sewer (for example, to an 8-inch line) if the study shows existing pipes are inadequate.

Neighbors spoke against the project during public comment. Paige Taylor, who lives at 125 Carol Street, said putting "more rooftops and asphalt" increases heat in the city, reduces tree cover and harms wildlife habitat, and asked what monitoring would be in place for structural damage to adjacent homes. Brian Miller, an abutter, and Greg Taylor raised concerns about density, privacy, traffic, on-street parking and the effect on property values; Miller said prior approvals had allowed far fewer units and called the current density "unbelievable." The developer and staff did not dispute the public concerns but cited compliance with the cottage-court overlay and the site layout tradeoffs that informed the design.

During deliberations, board members debated orientation (front doors vs. gable ends facing the street), design character and whether the proposal meets the purpose of the cottage-court overlay. Several members said Keene needs missing-middle housing; others said the design was "distastefully done" or did not fully reflect neighborhood character. The board settled on a motion that includes both precedent and subsequent conditions:

- Precedent conditions to be met before the chair signs final plans: owner signature on plans; submittal of final plan copies; recorded voluntary merger of the four parcels; submittal of securities for sediment/erosion control and landscaping; documentation of any easements; an updated plan showing native trees to replace callery pear plantings; and completion of a sewer flow study subject to city engineer review.

- Subsequent and construction-phase conditions: required pre-construction meeting with staff; erosion- and sediment-control inspections; survey and inspection of building corners prior to foundation placement; submittal of recorded easements; landscaping inspections at installation and one year later; foundation construction approved through the building permit process with stamped structural engineering reports; a requirement to upgrade sewer infrastructure if the sewer flow study deems it necessary; and a contractor-provided vibration-monitoring plan for pile-driving and deep-foundation work to monitor impacts on nearby structures.

The board's motion — read into the record with the conditions above — passed. The record shows the board approved the application and noted the conditions; staff will track precedent/subsequent requirements and the sewer flow study outcome.

What happens next: staff will confirm all precedent conditions have been met before the chair signs the final plans and will review subsequent items during permit and construction reviews. The developer will proceed to the building permit phase, where foundation designs and any vibration-monitoring plans must be submitted and inspected.

Sources: Board motion and staff report, applicant presentation by John Noonan, public comments by neighbors, and staff statements on required permits and conditions.