This is a list of English football transfers for the 2017 summer transfer window. Only moves featuring at least one Premier League or Championship club are listed.
The summer transfer window began once clubs had concluded their final domestic fixture of the 2016–17 season, but many transfers only officially went through on 1 July because the majority of player contracts finished on 30 June. The window remained open until 18:00 BST on 1 September 2017. The window shut at 18:00 BST this time due to the UEFA player registration deadlines for both the Champions League and Europa League ending at 23:00 BST, giving the 6 sides still in Europe time to conclude deals and register their player for continental matches if appropriate.
This list also includes transfers featuring at least one Premier League or Championship club which were completed after the end of the winter 2016–17 transfer window and before the end of the 2017 summer window.
Players without a club may join at any time, and clubs below Premier League level may sign players on loan during loan windows. Clubs may be permitted to sign a goalkeeper on an emergency loan if they have no registered goalkeeper available.
All clubs without a flag are English. Note that while Swansea City, Cardiff City and Newport County are affiliated with the Football Association of Wales and thus take the Welsh flag, they play in the English football league system, and so their transfers are included here.
a Player officially joined his club on 10 June 2017.
b Player officially joined his club on 1 July 2017.
c Player officially joined his club on 3 July 2017.
d Player will officially join his club on 24 July 2017.
Luke Matthew Daniels is an English professional footballer who plays for EFL League Two club Forest Green Rovers as a goalkeeper.
Joshua Joseph Jason Ishmel Clarke is an English professional footballer who plays as a right back or right winger. He is a graduate of the Brentford youth system and made over 80 appearances for the club between 2013 and his departure in 2020. After nearly two years out of the game, Clarke dropped into non-League football to transfer to Dartford in 2021, for whom he played until early 2022.
The 2015–16 season was Brentford's 126th year in existence and second consecutive season in the Championship. Along with competing in the Championship, the club also participated in the FA Cup and League Cup. The season covers the period from 1 July 2015 to 30 June 2016.
The 2015–16 season was Middlesbrough's seventh consecutive season in the Football League Championship in their 140th year in existence. Along with the Championship, the club also competed in the FA Cup and Football League Cup. The season covers the period from 1 July 2015 to 30 June 2016.
The 2016–17 season was Middlesbrough's fifteenth season in the Premier League, their first since relegation in the 2008–2009 season, after gaining promotion the previous season in their 141st year in existence. Along with the Premier League, the club also competed in the FA Cup and EFL Cup. The season covered the period from 1 July 2016 to 30 June 2017.
The 2016–17 season was Brentford's 127th year in existence and third consecutive season in the Championship. The club also participated in the FA Cup and League Cup. The season covers the period from 1 July 2016 to 30 June 2017.
Reece George Cole is an English professional footballer who plays as a central midfielder for EFL League One club Exeter City.
The 2017–18 season was Brentford's 128th year in existence and fourth consecutive season in the Championship. Along with competing in the Championship, the club also participated in the FA Cup and League Cup.
Theodore Valentine Archibald is a Scottish professional footballer who plays as a right winger for EFL League One club Leyton Orient.
The 2018–19 season was Brentford's 129th year in existence and fifth consecutive season in the Championship. Along with competing in the Championship, the club also participated in the FA Cup and the EFL Cup.
Marcus Uolevi Forss is a Finnish professional footballer who plays as a forward for EFL Championship club Middlesbrough and the Finland national team.
The 2019–20 season was Brentford's 130th year in existence and sixth consecutive season in the Championship. Along with competing in the Championship, the club also participated in the FA Cup and the EFL Cup.
The 2019–20 season was Middlesbrough's third consecutive season in the Championship in their 144th year in existence, the club also competed in the FA Cup and the EFL Cup. The season covered the period from 1 July 2019 to 20 July 2020.
Isaiah Benjamin Montell Jones is an English professional footballer who plays as a wing-back and winger for Middlesbrough.
The 2020–21 season was Middlesbrough's fourth consecutive season in the Championship in their 145th year in existence, the club also competed in the FA Cup and EFL Cup.
The 2020–21 Brentford F.C. season was the club's 131st season in existence and seventh consecutive season in the Championship, the second tier of English football. Brentford would also compete in the FA Cup and competed in the EFL Cup. The season covered the period from 1 September 2020 to 30 June 2021. Brentford secured promotion to the Premier League on 29 May 2021, following a 2–0 victory against Swansea City in the play-off final at Wembley, confirming the club's top flight status for the first time in 74 years.
Alexander George Henry Gilbert is a professional footballer who plays as an attacking midfielder for EFL Championship club Middlesbrough.
The 2021–22 Brentford F.C. season was the club's 132nd season in existence and first season in the Premier League, the top tier of English football. Brentford also competed in the FA Cup and the EFL Cup. The season covers the period from 1 July 2021 to 30 June 2022. Brentford secured promotion to the Premier League on 29 May 2021, following a 2–0 victory against Swansea City in the play-off final at Wembley, confirming the club's top flight status for the first time in 74 years.
The 2022–23 season was the 133rd season in the existence of Brentford Football Club and its second consecutive season in the Premier League. In addition to the Premier League, the club also competed in the FA Cup and the EFL Cup.
The 2023–24 season is the 134th season in the history of Brentford Football Club and their third consecutive season in the Premier League. In addition to the domestic league, the club participated in the FA Cup and the EFL Cup.