SC
Sienna Construction Ltd
Sienna Construction Ltd is a UK limited company, based in Southampton, incorporated in 2012. Has won 5 UK public-sector contracts worth £5.9m across 4 buyers, primarily Swindon Borough Council.
Active contracts
2
no new awards in 30d
Contracted (12m)
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no data
Public buyers
4
stable this month
Top buyer share
89%
Swindon Borough Council
Buyer concentration
Each block sized by share of total award value. A dominant block signals dependency on one buyer.
Severe concentration. Top buyer alone = 89% of revenue.
Swindon Borough Council
£5.2m
89%Southampton City Council
£675k
11%NATIONAL GRID UK LIMITED
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0%KBS MARITIME LIMITED
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0%Contracts won · 5 total · 2 active · 3 expired
Every contract award published under the Procurement Act.
| Title | Buyer | Award type | Value | Awarded | Status |
|---|---|---|---|---|---|
| Framework Agreement for refurbishment and fit-out works to Swindon Borough Council Heritage Assets, including first parcel of works for Unit 11 Carriageworks | Swindon Borough Council | Framework call off | £4.8m ceiling · ~£2.4m share (÷2) | 06 May 2019 | expired |
| Classroom Extension (& Associated External Works) at Fairisle Junior School, Southampton | Southampton City Council | Direct contract | £675k | 22 Jul 2019 | expired |
| Refurbishment of the Former Oxford Brookes Building, Swindon | Swindon Borough Council | Direct contract | £484k | 30 May 2018 | expired |
| Project Civils Framework | NATIONAL GRID UK LIMITED | Direct contract | — | — | active |
| KBS/0124/T/MCS1/NK The KBS Multi Discipline Subcontractor Framework 2024 | KBS MARITIME LIMITED | Shared contract | — lot total · 23 suppliers | — | active |