1929

• Elena and Highlands Light & Water Company purchased from W. Garth and H.K. Johnson on January 30.

1927

• Pasadena Light Company was purchased from Charles Meyer on February 28 for $6,250; 123 customers; estimated annual revenue $5,000.
• Bellaire Gem Electric Company purchased from Clarence Anderson on April 27 for $12,500; 321 customers; estimated annual revenue $16,000.
• South Houston Electric Company purchased from South Texas Fireworks Company on May 27 for $7,500; 61 customers; estimated annual revenue $4,000.
• Pelly electric property purchased from Charles Trifon on May 28 for $22,000; 371 customers; estimated annual revenue $20,000.
• Humble electric property purchased from S.P. Bellow on June 1 for $5,000; 60 customers; estimated annual revenue $4,000.
• Freeport Light, Water & Ice Company purchased from Freeport Sulphur Company on July 25.

1926

• HL&P used natural gas as a boiler fuel for the first time in February, pioneering the concept.

1925

• Goose Creek Water & Light Company purchased from R.S. Sterling, May 1.
• Uniform power schedule adopted for suburban towns, July 1.
• La Porte granted franchise, July 3.
• La Porte Water, Light & Ice Company purchased, October 5.

1922

• HL&P 1905 is acquired by National Power & Light, another General Electric property, in a transfer of stock on March 21.
• HL&P 1905 changed its name to Houston Lighting & Power Company on April 3 and formed the company that would serve the Houston area for the next 80 years.
• First electric traffic signals went into operation on May 18.