From that day onwards, the Church continued to move on gradually with worship services on every Sunday from 9:00 a.m.-10:30 a.m. Some families visited and worshipped with the new congregation in the home of the Opoku-Adusei family. Some of the notable visitors at the time who are still members of the Church are: Mr. George Hammond and his family and Ms. Dora Osei.
Mr. Eric Otubuah and his wife Mrs. Helen Otubuah also visited frequently. The two founding families continued to meet and worship together every Sunday, trusting God for growth in terms of membership. In September 2013, Mrs. Wendy Yeboa-Dankwa visited and was the first person amongst the numerous visitors who formally decided to be part of the ministry.
The Church membership grew from 10 to 12 when Dr. Samuel Sasu’s wife Mrs. Doris Sasu and daughter Nana Afia Kumiwaah Sasu joined the family in the USA from Germany and became members of the Church. In March 2014 the Church (with 12 members) decided to move from the residence of the Opoku-Adusei family in Eastvale to its current place (4495 Magnolia Avenue, Riverside, CA 92501) of worship.
In June 29, 2014, the Church organized its First Anniversary Celebration and the program was attended by over 70 invited guests who came from different parts of Southern California. The program was officiated by Rev. Barima Appiah-Dankwa, the then District Minister of PCG New York who also represented the Presbyterian Church of Ghana, North America & Australia Presbytery. He was accompanied by Mr. Eric Sarpong who represented PCG Manhattan Men’s Fellowship. During this service, three members of the Church, Mrs. Beatrice Sasu, Dr. Samuel Sasu, and Dr. Mark Opoku Adusei were inducted and introduced as the Interim Management Committee (IMC) of the Church.
The Church’s membership by the end of the first year had increased from 12 to 18 with the addition of Mr. George Hammond family, Ms. Dora Osei and Mr. Lawrence Hanson. By the end of 2014 the Church membership had increased to 35. Some of the notable families who became members include Mr. and Mrs. Afikorah Danquah and children, Mr. and Mrs. Lowor and son, Mr. and Mrs. Aryee, Mrs. Chinyere Ogugu and daughters, Mr Samuel Amissah.
In the first three years the Church was partly supported by the Presbyterian Church of Ghana, New York District. Rev. Frank Addo of Presbyterian Church of Ghana, Houston, Texas was assigned to oversee the Congregation. Local administration of the Church was carried out by the IMC. Later in the year, Mr. Seth Afikorah Danquah, and Mr. Yaw Yeboa-Dankwa were selected to join the IMC. At this time the offices of the IMC were defined as follows:

• Dr. Mark Opoku-Adusei: (Chairperson)
• Dr. Samuel Sasu: (Clerk)
• Mrs. Beatrice Sasu (Treasurer)

After Mrs. Sasu relocated to Ghana, Mrs. Rhoda Mondeh-Lowor was selected to join the IMC and Mr. Seth A. Danquah became the Treasurer. The Church continued to experience growth and by the end of 2015 the membership had increased to over 60. This growth continued to 70 in 2016 and by the end of 2017 the membership count was approximately 90. In 2018 the Presbyterian Church of Ghana Grace Congregation was inaugurated under the leadership of Rev. Barima Appiah-Dankwa and the following were elected as the first Session of PCG, Grace Congregation (and by default first Session of PCG, Western Mission Field of USA):

• Dr. Mark Opoku-Adusei: (Senior Presbyter)
• Mrs. Justina Ohenewaa Aryee: (Session Clerk)
• Mr. Seth Afikora Danquah: (Treasurer)
• Mr. Yaw Yebaoh Dankwa: (Protocol Officer)
• Dr. Jonathan Yawson: (Member)
• Mrs. Gloria Quartey Addo: (Member)
• Ms. (Rev) Florence Arthur: (Member)

In October 2018, Rev. Dr. Kwame Amoah- Kuma was appointed as the acting Minister-in-Charge of the Western Mission Field until the designated minister Rev. Edmund Kwaah Amankonah who has been posted arrived in March 2019 to take over as the Minister-in-Charge of the Western Mission Field.