How much does J a Brooks Mechanical Services Limited make?

J a Brooks Mechanical Services Limited reported revenue of £27.1m and £881k profit in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does J a Brooks Mechanical Services Limited have?

J a Brooks Mechanical Services Limited reported an average of 119 employees in the year to 31 Mar 2025.

Is J a Brooks Mechanical Services Limited profitable?

Yes — J a Brooks Mechanical Services Limited reported a profit of £881k in the year to 31 Mar 2025.

Company No. 10065658 · Incorporated 16 Mar 2016

J a Brooks Mechanical Services Limited

Registered name: J A BROOKS MECHANICAL SERVICES LIMITED

Part of J a Brooks Holdings Ltd group

J a Brooks Mechanical Services Limited made £27.1m revenue and £881k profit in the year to 31 Mar 2025.

J a Brooks Mechanical Services Limited’s revenue grew 19% to £27.1m in the year to 31 Mar 2025, with £881k profit and 119 employees. The company is classified under “plumbing, heat and air-conditioning installation” and is based in London; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43220Plumbing, heat and air-conditioning installation

Status: Active
Location: London, London
Age: 10 yrs · since 2016
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.

Latest accounts · year to 31 Mar 2025

Key figures

Capital-lightBoring industryCash flow filed

Revenue

£27.1m

Growth ▲19.4%

Profit

£881k

Growth ▼43.7%

Profit margin

3.3%

Gross 29.4%

Employees

119

Change ▲48.8%

Profit / employee

£7.4k

Revenue/employee £228k

Profitable streak

4yrs

Consecutive profitable years in our data

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

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Mar 2022	31 Mar 2023	31 Mar 2024	31 Mar 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£17m	£24.7m	£22.7m	£27.1m
Cost of sales	£12.3m	£18.5m	£15.1m	£19.1m
Gross profit	£4.7m	£6.2m	£7.6m	£8m
Operating profit	£1.4m	£2m	£2.1m	£740k
Profit before tax	£1.4m	£2.1m	£2.1m	£776k
Profit after tax	£1.7m	£2m	£1.6m	£881k
Profit (best available)	£1.7m	£2m	£1.6m	£881k
Staff costs	£3.7m	£4.4m	£5.2m	£7.5m
Employees (average)	56	66	80	119
Ratios
Profit margin	9.9%	8%	6.9%	3.3%
Gross margin	27.4%	25.1%	33.6%	29.4%
Revenue per employee	£304k	£374k	£283k	£228k
Profit per employee	£30.2k	£30k	£19.6k	£7.4k
Cash conversion	134.3%	83.9%	−44.3%	281.9%
Growth (year on year)
Revenue growth	—	▲44.9%	▼8%	▲19.4%
Profit growth	—	▲17.3%	▼21%	▼43.7%
Headcount growth	—	▲17.9%	▲21.2%	▲48.8%
Balance sheet — indirect signals, not revenue
Cash at bank	£3.4m	£4.6m	£3.4m	£4.5m
Net assets	£3.7m	£5.7m	£7.3m	£7.2m
Fixed assets	£121k	£349k	£503k	£417k
Current assets	£9.2m	£10.5m	£11.8m	£12.2m
Debtors	£3.8m	£2.6m	£4.3m	£3.7m
Deferred income	£2.5m	£2.1m	£1.4m	£1.9m
Cash from operations	£1.9m	£1.7m	−£912k	£2.1m
Source	FullAccounts · bulk data Dec 2023	FullAccounts · bulk data Dec 2023	FullAccounts · bulk data Dec 2024	FullAccounts · bulk data Dec 2025

Derived from the latest filing

How the business works

Profit margin: 3.3%; Profit ÷ revenue.
Gross margin: 29.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £228k; Revenue ÷ average employees.
Profit per employee: £7.4k; Profit ÷ average employees.
Cash conversion: 281.9%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 1.5%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 7.2%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 13.8%; 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: ▼0%; Now £7.2m
Cash at bank: ▲33%; Now £4.5m
Headcount: ▲49%; Now 119
Deferred income: ▲43%; Now £1.9m
Fixed assets: ▼17%; Now £417k

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

J a Brooks Holdings Ltdultimate parent75–100%
J a Brooks Mechanical Services Limitedthis company

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

Sister companies (1)

J a Brooks Properties LtdFigures not disclosed

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

Same industry, similar size

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Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Mar 2025 (profit £881k), from the Companies House accounts bulk data published Dec 2025. 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.