Business Office: 4498 Lawson Ct.
(925) 687-9961
Security: (877) 900-1110





If this is a life-threatening emergency, dial 9-1-1.

If you have a problem on your street or private residence, please call the Concord Police Department at:

Concord Police – Emergency: (925) 671-3333
Concord Police – Non-emergency: (925) 671-3220
Concord Police – Abandon Vehicle: (925) 671-3259

On-site Security

Our onsite security company, First Security Services conducts random patrols of our common areas and facilities only. To contact First Security Services, call (877) 900 – 1110.

Business Office

The CHOA Business Office is the administrative home for Walnut Country and its day-to-day operations. The General Manager is Rhiannon Harris. The community is managed by Collins Management.

Homeowners, residents, and business vendors may contact the Business Office for questions about the community including Board of Directors meeting documents, architectural applications and rules, governing documents, etc.

Business Office Location

4498 Lawson Court
Concord, CA 94521

Business Office Hours

Monday – Friday from 9a to 5p.

Business Office Contact or (925) 687-9961.

For help when the Business Office is closed, contact the Clubhouse at (925) 825-0250. If the Clubhouse is closed, contact Collins Management at 510-381-5016.


The Clubhouse manages activities and common area use in the community including facility access keys, resident and guest badges, and space rentals. The Clubhouse Director is Stephen Sulyma.

Clubhouse Location

4465 South Larwin Avenue
Concord, CA 94521

Clubhouse Hours

Monday – Saturday from 12-8p
Sunday from 12-6p

Clubhouse Contact or (925) 825-0250

Management Company

Walnut Country is managed by Collins Management. Rhiannon Harris, employed by Collins Management, is Walnut Country’s General Manager.

Collins Management

500 Alfred Nobel Drive, Suite 250
Hercules, CA 94547
510-262-1795 (business hours)

510-381-5016 (after hours CHOA property emergency)

CHOA Board of Directors

The CHOA Board of Directors is comprised of seven positions filled by homeowners on a strictly volunteer (unpaid) basis. To contact the Board, email the General Manager at Homeowners may access individual email addresses for each Board member in the password-protected section of this website.

As of September 27, 2018, the Board of Directors are:

  • Mark Weinmann –
  • Todd Peterson – Vice-President, Landscape Committee Chair
  • Donna Glover – Treasurer, Activities Committee and Rules Committee Chair
  • Rich Ellenson – Secretary, Communications
  • Marc Buchanan
  • Barry Collins – Safety and Security Committee Chair
  • Dave Stelter – Architecture Committee Chair

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