How much does The Castle Building Services Organisation Limited make?

The Castle Building Services Organisation Limited reported revenue of £66.3m and £7.9m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does The Castle Building Services Organisation Limited have?

The Castle Building Services Organisation Limited reported an average of 120 employees in the year to 31 Dec 2025.

Is The Castle Building Services Organisation Limited profitable?

Yes — The Castle Building Services Organisation Limited reported a profit of £7.9m in the year to 31 Dec 2025.

Company No. 08331581 · Incorporated 14 Dec 2012

The Castle Building Services Organisation Limited

Registered name: THE CASTLE BUILDING SERVICES ORGANISATION LIMITED

Part of Cbso Holdings Ltd group

The Castle Building Services Organisation Limited made £66.3m revenue and £7.9m profit in the year to 31 Dec 2025. read from filing text

The Castle Building Services Organisation Limited’s revenue grew 26% to £66.3m in the year to 31 Dec 2025, with £7.9m profit and 120 employees. The company is classified under “construction of commercial buildings” and is based in Hebburn; we hold 3 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 41201Construction of commercial buildings SIC 43210Electrical installation SIC 43220Plumbing, heat and air-conditioning installation

Status: Active
Location: Hebburn, North East
Age: 13 yrs · since 2012
Type: Private Limited Company

Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently. From the filing: “The company's ultimate controlling party is CBSO Holdings Limited, whose registered office address is 6 Merchant Court, Merchant Court, Monkton Business Park South, Hebburn, Tyne and Wear, NE31 2EX.”

Latest accounts · year to 31 Dec 2025

Key figures

Capital-lightOperating leverageCash flow filed

Revenue

£66.3m

Growth ▲25.6%

Profit

£7.9m

Growth ▲98.3%

Profit margin

11.9%

Gross 23.9%

Employees

120

Change ▲4.3%

Profit / employee

£65.7k

Revenue/employee £552k

Profitable streak

3yrs

Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Dec 2023	31 Dec 2024	31 Dec 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£27.4m	£52.8m	£66.3m
Cost of sales	£18.4m	£42.6m	£50.5m
Gross profit	£9m	£10.2m	£15.8m
Operating profit	£3.6m	£4.3m	£9.5m
Profit before tax	£3.5m	£4.2m	£9.4m
Profit after tax	£3.2m	£4m	£7.9m
Profit (best available)	£3.2m	£4m	£7.9m
Staff costs	£5.5m	£7.2m	£7.5m
Employees (average)	113	115	120
Ratios
Profit margin	11.8%	7.5%	11.9%
Gross margin	32.8%	19.4%	23.9%
Revenue per employee	£243k	£459k	£552k
Profit per employee	£28.6k	£34.6k	£65.7k
Cash conversion	−60.5%	−259.5%	−48.2%
Growth (year on year)
Revenue growth	—	▲92.5%	▲25.6%
Profit growth	—	▲23.2%	▲98.3%
Headcount growth	—	▲1.8%	▲4.3%
Balance sheet — indirect signals, not revenue
Cash at bank	£2.1m	£8.6m	£6.7m
Net assets	£2m	£2.1m	£5.5m
Fixed assets	£328k	£240k	£676k
Current assets	£9.7m	£20m	£22.5m
Debtors	£633k	£825k	£7.3m
Deferred income	£3.4m	£11.8m	£11m
Cash from operations	−£2.2m	−£11.1m	−£4.6m
Source	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: 11.9%; Profit ÷ revenue.
Gross margin: 23.9%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £552k; Revenue ÷ average employees.
Profit per employee: £65.7k; Profit ÷ average employees.
Cash conversion: −48.2%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 1%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 16.6%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 11%; Money owed by customers. Low = customers pay quickly.

Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets: ▲162%; Now £5.5m
Cash at bank: ▼21%; Now £6.7m
Headcount: ▲4%; Now 120
Deferred income: ▼6%; Now £11m
Fixed assets: ▲182%; Now £676k

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

Cbso Holdings Ltdultimate parent75–100%
The Castle Building Services Organisation Limitedthis company

Bands show the share of ownership each company holds in the one below it.

Subsidiaries (1)

Castle Building Services (South) LimitedFigures not disclosed

Sister companies (5)

Castle (FM) Facilities Management LimitedFigures not disclosed
Castle (Ne) Homes LimitedFigures not disclosed
Castle Design LimitedFigures not disclosed
Castle Sustainability LimitedFigures not disclosed
Castle UK Build LimitedFigures not disclosed

From the Persons with Significant Control register (corporate controllers only).

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £7.9m), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.