During the 1929–30 English football season, Brentford competed in the Football League Third Division South. Brentford finished as runners-up, the club's highest finish in the pyramid at that time and statistically it is the club's best-ever season. Brentford became the fifth club to win all their home Football League matches in a season and as of the end of the 2015–16 season, the Bees' total of 21 home victories from 21 matches has never been bettered. Billy Lane set a new club record of 33 goals in all competitions, which would stand for three years. The club also reached the final of the London Challenge Cup for the first time.

Brentford manager Harry Curtis tinkered with his squad in the 1929 off-season, releasing half backs Jack Beacham, Stephen Dearn and a number of young forwards who failed to make the grade during the previous season. In came full back Tom Adamson, half backs Reginald Davies (the new captain),Harry Salt and forwards Cecil Blakemore, Jackie Foster, Billy Lane and John Payne. Brentford went on to have their best season at that time in the Football League, ending 1929 in second place and ascending to the top of the Third Division South on 25 January 1930. The good results were due to a consistently fit starting XI, which went unchanged for 21 consecutive matches in all competitions between 2 November 1929 and 15 March 1930, a club record. Top spot was held onto until a 0–0 with Exeter City on 29 March saw Plymouth Argyle overtake Brentford and the title and automatic promotion were effectively conceded after successive defeats in mid-April. Brentford finished as runners-up and would remain in the Third Division South for 1930–31. The Bees finished the season with four players scoring 15 goals or more – Billy Lane (33), Jack Lane (19), John Payne (16) and Cecil Blakemore (15).

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