Source: https://tendernation.io/suppliers/castle-building-services-organisation [Skip to main content](#main-content) Supplier profile # The Castle Building Services Organisation Limited Public sector contracts won, from published award notices SME[Companies House 08331581](https://find-and-update.company-information.service.gov.uk/company/08331581) [ Follow competitor](/login "Sign in to follow competitors")[ Compete for this work](/register) Contracts won 6 since 3 May 2023 Total awarded £883,664 where values were published Buyers 5 public bodies Latest win 2 Oct 2026 ## Recent contract awards - [National Framework for Major Works 2026](https://tendernation.io/opportunities/01a13bdc-dcb7-72cd-a726-a94996202284/national-framework-for-major-works-2026)[YPO](https://tendernation.io/buyers/ypo) Value not published 2 Oct 2026 - [S185 Drainage Diversion Contract](https://tendernation.io/opportunities/01a13bbe-4024-7018-83de-803a6fbbea9f/s185-drainage-diversion-contract)[South Tyneside Borough Council](https://tendernation.io/buyers/south-tyneside-borough-council) £789,655 11 Jun 2025 - [S278 Works for College Relocation](https://tendernation.io/opportunities/01a13bbe-3e8c-7152-bbb6-4b715e1a6834/s278-works-for-college-relocation)[South Tyneside Borough Council](https://tendernation.io/buyers/south-tyneside-borough-council) £94,009 22 May 2025 - [National Framework for Decarbonisation Solutions](https://tendernation.io/opportunities/01a13ba5-6cc7-732e-b810-436de3ab9d97/national-framework-for-decarbonisation-solutions)[Kingston upon Hull City Council](https://tendernation.io/buyers/kingston-upon-hull-city-council) Value not counted: framework or estimated ceiling 23 Apr 2024 - [National Framework for Decarbonisation Solutions](https://tendernation.io/opportunities/01a13ba5-6cc7-732e-b810-436de3ab9d97/national-framework-for-decarbonisation-solutions)[Kingston upon Hull City Council](https://tendernation.io/buyers/kingston-upon-hull-city-council) Value not counted: framework or estimated ceiling 23 Apr 2024 - [National Framework for Decarbonisation Solutions](https://tendernation.io/opportunities/01a13ba5-6cc7-732e-b810-436de3ab9d97/national-framework-for-decarbonisation-solutions)[Kingston upon Hull City Council](https://tendernation.io/buyers/kingston-upon-hull-city-council) Value not counted: framework or estimated ceiling 23 Apr 2024 - [Heat Decarbonisation for 4 Ambulance Stations at East Midlands Ambulance Service NHS Trust](https://tendernation.io/opportunities/01a13bcb-0774-7158-85dc-2c55d6d05b8e/heat-decarbonisation-for-4-ambulance-stations-at-east-midlands-ambulance-service)[East Midlands Ambulance Service NHS Trust](https://tendernation.io/buyers/east-midlands-ambulance-service-nhs-trust) Value not counted: framework or estimated ceiling 15 Aug 2023 - [Heat Decarbonisation for 4 Ambulance Stations at East Midlands Ambulance Service NHS Trust](https://tendernation.io/opportunities/01a13bcb-0774-7158-85dc-2c55d6d05b8e/heat-decarbonisation-for-4-ambulance-stations-at-east-midlands-ambulance-service)[East Midlands Ambulance Service NHS Trust](https://tendernation.io/buyers/east-midlands-ambulance-service-nhs-trust) Value not counted: framework or estimated ceiling 15 Aug 2023 - [Heat Decarbonisation for 4 Ambulance Stations at East Midlands Ambulance Service NHS Trust](https://tendernation.io/opportunities/01a13bcb-0774-7158-85dc-2c55d6d05b8e/heat-decarbonisation-for-4-ambulance-stations-at-east-midlands-ambulance-service)[East Midlands Ambulance Service NHS Trust](https://tendernation.io/buyers/east-midlands-ambulance-service-nhs-trust) Value not counted: framework or estimated ceiling 15 Aug 2023 - [Heat Decarbonisation for 4 Ambulance Stations at East Midlands Ambulance Service NHS Trust](https://tendernation.io/opportunities/01a13bcb-0774-7158-85dc-2c55d6d05b8e/heat-decarbonisation-for-4-ambulance-stations-at-east-midlands-ambulance-service)[East Midlands Ambulance Service NHS Trust](https://tendernation.io/buyers/east-midlands-ambulance-service-nhs-trust) Value not counted: framework or estimated ceiling 15 Aug 2023 - [BSH/HRA/ SEND Capital Throgmorton](https://tendernation.io/opportunities/01a13b99-a0ef-73bd-8916-53c843ad1129/bshhra-send-capital-throgmorton)[Bristol City Council](https://tendernation.io/buyers/bristol-city-council) Value not counted: framework or estimated ceiling 3 May 2023 ## Companies House StatusActive Incorporated14 Dec 2012 (13 yrs) AccountsFull IndustryConstruction of commercial buildings [View filing history](https://find-and-update.company-information.service.gov.uk/company/08331581)## Who they win from - [South Tyneside Borough Council2 wins](https://tendernation.io/buyers/south-tyneside-borough-council) - [YPO1 win](https://tendernation.io/buyers/ypo) - [Kingston upon Hull City Council1 win](https://tendernation.io/buyers/kingston-upon-hull-city-council) - [East Midlands Ambulance Service NHS Trust1 win](https://tendernation.io/buyers/east-midlands-ambulance-service-nhs-trust) - [Bristol City Council1 win](https://tendernation.io/buyers/bristol-city-council) ## Latest accounts Profit or loss£7,883,099 Net assets£5,504,810 Cash£6,732,754 Employees120 Year to 31 Dec 2025, from accounts filed at Companies House. ## Bids named on award notices Bid for 1 contract: won 0, lost 1. - [Lost: Sunderland City Council](https://tendernation.io/opportunities/01a13bd5-38de-73ee-90eb-b8405782db7c)7 Aug 2026 Award notices have listed every bidder only since the Procurement Act (February 2025). ## What they win - [Construction work](https://tendernation.io/sectors/construction-work)3 - [Industrial machinery](https://tendernation.io/sectors/industrial-machinery)1 Competing with The Castle Building Services Organisation Limited? 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