The Novotel Brentford is the first of the London openings, with 202 rooms. Accor has also announced a new-build Novotel at 40 Marsh Street, Canary Wharf, which is due to open during 2016.
The second London opening, Mercure London Heathrow, will open in the spring with 184 rooms.
Three of the upcoming openings will be ibis properties, Accor’s economy brand, which includes the 115-bedroom ibis Styles Kensington.
Two hotels will be opening in Edinburgh, which includes the ibis Edinburgh Park, with 161 bedrooms, and ibis Styles, St Andrew Square, with 103 bedrooms.
Thomas Dubaere, managing director, Accor UK & Ireland, said: "These openings further strengthen our presence in the key business and leisure locations of London and Edinburgh and are another important step in expanding our UK network. As part of our ambitious expansion plans we are demonstrating our commitment to strengthening the portfolio across our budget and midscale brand segments."