Planning Board approves site‑review amendment and recommends annexation change for Peacock Place to allow taller ADUs and house roof forms

The City of Boulder Planning Board on Aug. 5 approved a site‑review amendment for Peacock Place (5691 South Boulder Road) and unanimously recommended that city council adopt a corresponding annexation agreement amendment. The board voted 6‑0 to approve the site‑review amendment (case LUR2025‑00022) and then voted 6‑0 to recommend approval of the annexation amendment (case LUR2025‑00018); city council is scheduled to consider the annexation amendment on Aug. 21.

The amendments respond to technical changes discovered during final engineering (TechDoc) review that raised proposed finished‑floor elevations across the eastern portion of the 5.3‑acre site. Chandler Van Schaack, principal planner, told the board that additional fill of roughly 2–3 feet—required to meet utility and storm‑drainage requirements—raised the apparent building height when measured under the city’s existing height definition, which measures height from historic (existing) grade. The applicant asked for two changes: (1) a height modification under the site review process to allow up to 40 feet for six market‑rate homes; and (2) an amendment to the annexation agreement to allow accessory dwelling units (ADUs) up to 32 feet instead of the 25‑foot limit in the current agreement.

Chandler Van Schaack said staff found the proposed changes do not alter the previously approved density, open space, landscaping or the community benefit package negotiated at annexation. The community benefit package remains in place: the project retains the requirement that 40% of the new homes (six units) be permanently affordable at middle‑income AMI bands, plus the required construction of six ADUs and wetland mapping and preservation secured through the annexation.

Applicant representatives and engineers explained why the height relief is needed. Mike Cooper, project representative for Boulder Creek Neighborhoods, said final grading, drainage and utility coordination required modest additional fill and that the design team requested modest maximum heights to preserve the architectural forms shown in the approved design guidelines. Don Ash of Site Works explained that the project’s topography and required outfall elevation for the site’s detention pond mean finished floor elevations had to rise in places; those higher finished floors create a difference between finished‑grade height measurements and the code’s historic‑grade measurement. Ash told the board engineers evaluated alternatives including shifting building footprints and that the design team sought a uniform, modest height allowance so individual home plans could remain market‑flexible.

Board members and members of the public discussed watershed and neighborhood impacts. A neighbor, Lynn Siegel, opposed the change and expressed concern about fill and floodplain impacts; she urged the board to hold the project to existing limits. Staff and the applicant emphasized that drainage requirements drove the change and that the annexation conditions (affordability, ADUs and wetland easement) remain intact.

The board’s actions: Mark McIntyre moved to approve the site‑review amendment (LUR2025‑00022), Mason Roberts seconded; the roll call vote was unanimous (George Boone, Mark McIntyre, ML Robles, Mason Roberts, Kurt Nordback and Chair Laura Kaplan voted YES). Later the board voted to recommend city council approve the annexation agreement amendment (LUR2025‑00018) with the same 6‑0 tally.

Staff noted one minor drafting issue in the design‑guidelines amendment—language about blown fiberglass insulation in ADUs appears to have been included in error; staff said it will be corrected administratively before transmittal to council.

Ending: The annexation amendment will go to city council on Aug. 21. If council does not call up the site‑review amendment, planning board’s site‑review decision will stand; if council calls up the site review it would be considered at a future council hearing.