Breweries
There are currently three breweries in the Croydon & Sutton branch area:

Anspach & Hobday
Anspach & Hobday opened their brewery in Croydon in 2019, having previously brewed in Bermondsey.
Please see brewery website for beer range and on-line shop. https://www.anspachandhobday.com
There is not currently a taproom at the brewery. Their taproom is the Arch House, 118 Druid Street, London, SE1 2HH. WhatPub - Anspach & Hobday - The Arch House
Brewery Liaison Officer: Alex Lines

Cronx Brewery
Please note that the Cronx brewery is not brewing at present, while the business is restructured. It is expected to restart brewing but there is no definite timescale yet.
Cronx commenced brewing in August 2012 and beers include Old Town (ABV 3.8%), Kotchin (ABV 3.9%), Nektar (ABV 4.5%), PopUp! (ABV 5.0%) and Entire (ABV 5.2%).
Other cask ales are sometimes brewed, e.g. Scarf Ritual (ABV 5.5.%).
A range of bottled and canned beers is also available.The Cronx Tap is not currently open except for special events. WhatPub - Cronx Tap
Brewery Liaison Officer: Mark Silverstein

Signal Brewing Company
Signal commenced brewing in 2016 at 8 Stirling Way, Beddington Farm Road, Croydon, CR0 4XN and beers include The Lager (ABV 4.8%), Turbo Joost IPA (ABV 5.5%) and Pale Ale (ABV 4.9%). There are no plans to brew cask ale in 2025 but this will be reviewed in due course.
Signal Brewery website: Signal Brewery
The brewery taproom is currently open for special events only: WhatPub - Signal Taproom
Brewery Liaison Officer: Steve Thompson
A bit of history
Click this link: Croydon Breweries history for a short history of the three 19th century Croydon breweries.
Click these links for brief notes on more breweries: