Happy Valley Road Hillside Residence
Summary
A proposed 6,160-square-foot house on a steep Happy Valley Road parcel reignited long-running neighbor fears about flooding, mudslides, and giant retaining walls looming over the road. Four neighbors opposed, citing a 2018 denial and drainage problems, and the Commission put off a decision to April 20.
At a glance
- Total mentions
- 2
- Last 30 days
- 0
Last discussed Apr 20, 2026.
Impact analysis
Neighbors worry drainage changes and construction could create costly flooding and mudslide risks; the applicant says runoff would actually drop.
The property owner seeking to build a modern hillside home.
Neighbors below the site say flooding, drainage, and retaining wall impacts fall on them.
Mentions & discussions (2)
Planning Commission - Apr 20, 2026
A 6,160-square-foot home on a steep Happy Valley Road lot drew strong neighbor opposition over renderings said to understate the slope, disputed storm drain connections, grading intensity and tree removal. The Commission approved Phase I 3-1 with added tree-retention and peer-reviewed hydrology conditions.
Planning Commission - Mar 2, 2026
A proposed 6,160-square-foot house on a steep Happy Valley Road parcel reignited long-running neighbor fears about flooding, mudslides, and giant retaining walls looming over the road. Four neighbors opposed, citing a 2018 denial and drainage problems, and the Commission put off a decision to April 20.
Related development
Collins Hillside Residence
Neighbors fear up to 16-foot retaining walls near the road and drainage changes on one of Lafayette's steepest slopes; the Commission wants section views, wall dimensions, and updated hydrology before deciding.
Collins Happy Valley Road Residence (HDP33-25, DR24-25, LLR05-25, GR10-25, TP69-25)
Neighbors remain worried about drainage onto their properties, slope stability, and visual impacts; Phase II review gives them another chance to weigh in.
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