The highest value lot for projects over £15m saw Bowmer & Kirkland, BAM and Kier drop out to be replaced by Andrew Scott and Interserve this time around.
They join Morgan Sindall, Bouygues and Willmott Dixon which all retained their places.
Carmarthenshire County Council, in association with Neath Port Talbot County Borough Council, Pembrokeshire County Council, Ceredigion County Council and Swansea Council, will use the panel of firms.
The framework will also be open to blue light services and NHS Trusts to construct, refurbish and repair buildings for the next four years, until 2024.
Framework winners by region
South West Wales
Project value: £15m and above
Andrew Scott; Interserve Construction; Morgan Sindall; Bouygues UK; Willmott Dixon
Project value: £9m-£15m
Andrew Scott; Vinci Construction; Kier Western; Bouygues UK; Willmott Dixon Construction
West Region – Carmarthenshire, Ceredigion, Pembrokeshire and Powys
Project value: £5m-£9m
Andrew Scott; Interserve Construction; Lloyd and Gravell; BAM Construction; Vinci Construction UK; Kier Western; Morgan Sindall; Wynne Construction
Project value:£1.5m-£5m
Tycroes Group; John Weaver (Contractors); WRW Construction; T. Richard Jones (Betws); Andrew Scott; Interserve Construction; Lloyd and Gravell; Morganstone Construction;
Project value: £750,000-£1.5m
Lloyd and Gravell; Tycroes Group; T. Richard Jones (Betws); John Weaver (Contractors); W.B. Griffiths and Son; WRW Construction; T.A.D. Builders; Jones Brothers (Henllan);
Project value: up to £750,000
John Weaver (Contractors); T Richard Jones (Betws); Lloyd and Gravell; WRW Construction; W.B. Griffiths and Son; T.A.D. Builders; Lewis Construction Llanelli; Jones Brothers (Henllan)
East Region – Neath Port Talbot and Swansea
Project value: £5m-£9m
WRW Construction; Andrew Scott; Interserve Construction; BAM Construction; Vinci Construction UK; Kier Western; Morgan Sindall; Wynne Construction
Project value: £1.5m-£5m
Tycroes Group; John Weaver (Contractors); WRW Construction; T. Richard Jones (Betws); Andrew Scott; Interserve Construction; Morganstone Construction;
Project value: £750 000-£1.5m
Tycroes Group; John Weaver (Contractors); WRW Construction; TAD. Builders; T. Richard Jones (Betws); Jones Brothers (Henllan)
Project value: up to £750,000
John Weaver (Contractors); WRW Construction; TAD. Builders; T. Richard Jones (Betws); Jones Brothers (Henllan);