SUNCOMPLAINTS.COM · COMMUNITY REPORT PAGE
Alta Laguna
Rancho Cucamonga, CA · Owner: Sun Communities, Inc. (NYSE: SUI)
About this community
| Community | Alta Laguna |
|---|---|
| Address | See directory listing (being verified for this page) |
| City / State | Rancho Cucamonga, CA |
| Acquired by Sun | 2016 |
| Sites / lots | 295 (MHBO directory profile) |
| Year built | 1971 (MHBO directory profile) |
| Source | Sun Communities FY2025 Form 10-K, Schedule III (SEC filing) |
Directory listing: MHBO community page (third-party directory; address data cross-checked against it).
The numbers reported here
No verified figures have been filed for this community yet. The first residents to report lot-rent history, fees and pass-through charges set the baseline this page tracks — every figure labeled with its source and date.
Resident reports
No reports have been published from this community yet. Reports are published as the resident's own account, with a verification tier (anonymous / resident-verified / named) and an affidavit option.
Be the first to report from Alta Laguna File a complaint now
Buyback & blocked-sale record
This page tracks reported cases where a resident says the park bought their home, or a sale to an outside buyer was blocked or stalled: what the resident was offered, what independent buyers offered, and what the home later sold for. No cases filed yet for this community.
What residents say elsewhere
Collected from public sources, summarized and attributed, with links to the originals. Summaries describe what reviewers and reporters say; allegations are not findings.
- other · 4.3 — Birdeye lists 4.3 stars from 97 reviews for Alta Laguna at 10210 Base Line Rd, Rancho Cucamonga. Reviewers alleging residence there describe, in paraphrase: expensive homes with high well-water charges, lot rent rising yearly including a claim of about 6% annually and another claim of about $40/year plus annual pass-through fees, a $200/month extra charge for a pond-view lot that allegedly became a mud pit, selective violation enforcement, unresolved complaints, closed pool/hot tub and slow repairs, and flooding/drainage and sloping problems that reviewers allege Sun blamed on homeowners until attorneys were hired, plus a Feb. 13, 2026 notice allegedly revoking a long-standing third-car street-parking permit and threatening towing. Caution: Birdeye is an aggregation source with documented cross-park pool mixing and park attribution is uncertain — the same page includes text appearing to reference other parks/communities. Original source
Themes: rent, pass-throughs, utilities, maintenance, management, amenities, fees - other — SpaceRentGuide lists Alta Laguna Mobile Estates, Rancho Cucamonga, as a 55+ park with average space rent/HOA of $750 per month. The figure is a listing estimate, not a lease document, and the page notes readers should research all monthly fees. Original source
Themes: rent, fees - other — MHBO profile for Alta Laguna at 10210 Baseline, Rancho Cucamonga, states it is managed on-site by Sun Communities, Inc., is age-qualified, and warns lot rent and other fees can change at any time without notice and additional amenity fees may apply. No resident complaint narrative was found on this profile. Original source
Themes: rent, fees, management - news · 2026-02-04 — City of Rancho Cucamonga Amended and Restated Mobile Home Park Accord, effective Feb. 4, 2026, between the city and owners of certain mobile home parks in the city, providing for an annual maximum rent adjustment. The recitals cite a shortage of mobile home spaces, high moving costs, and a need to protect residents from unreasonable space rent increases while allowing owners a reasonable return. The document is a citywide accord, not a park-specific complaint against Alta Laguna. Original source
Themes: rent, governance
Fight back in CA
State Attorney General — file a consumer complaint with the CA Attorney General's office: official complaint page · Office phone: (916) 445-9555. (Officeholder listings change with elections; this route is to the office, verified October 2025.)
Build an AG-ready packet: a dated, specific account — what happened, when, what it cost you, what management said — carries more weight than a phone call. This portal's report flow turns your account into exactly that, with an optional signed affidavit.
Sun Communities' response
Sun Communities is invited to respond to any report published about this community. Substantive responses are published here, alongside the reports.
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