Elections toBrentwood Council were held on 6 May 1999. One third of the council was up for election and theLiberal Democrat party kept overall control of the council.
After the election, the composition of the council was
| Party | Seats | Gains | Losses | Net gain/loss | Seats % | Votes % | Votes | +/− | |
|---|---|---|---|---|---|---|---|---|---|
| Liberal Democrats | 9 | +1 | 64.3 | ||||||
| Conservative | 4 | -2 | 28.6 | ||||||
| Independent | 1 | +1 | 7.1 | ||||||
