How much does WJ Groundwater Limited make?

WJ Groundwater Limited reported revenue of £13m and £384k profit in the year to 30 Apr 2025, according to its accounts filed at Companies House.

How many employees does WJ Groundwater Limited have?

WJ Groundwater Limited reported an average of 87 employees in the year to 30 Apr 2025.

Is WJ Groundwater Limited profitable?

Yes — WJ Groundwater Limited reported a profit of £384k in the year to 30 Apr 2025.

Company No. 01586827 · Incorporated 21 Sep 1981

WJ Groundwater Limited

Registered name: WJ GROUNDWATER LIMITED

Part of WJ Management Limited group

WJ Groundwater Limited made £13m revenue and £384k profit in the year to 30 Apr 2025. read from filing text

WJ Groundwater Limited’s revenue grew 5% to £13m in the year to 30 Apr 2025, with £384k profit and 87 employees. The company is classified under “test drilling and boring” and is based in Kings Langley; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43130Test drilling and boring SIC 43999Other specialised construction activities n.e.c.SIC 74100specialised design activities

Status: Active
Location: Kings Langley, East of England
Age: 45 yrs · since 1981
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 parent undertaking is WJ Management Limited, a company incorporated in England and Wales.”

Latest accounts · year to 30 Apr 2025

Key figures

Revenue

£13m

Growth ▲4.7%

Profit

£384k

Growth ▼62.7%

Profit margin

2.9%

Gross 49.2%

Employees

Change ▲10.1%

Profit / employee

£4.4k

Revenue/employee £150k

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	30 Apr 2022	30 Apr 2023	30 Apr 2024	30 Apr 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£8m	£11.7m	£12.4m	£13m
Cost of sales	£4.9m	£6.1m	£6.1m	£6.6m
Gross profit	£3.1m	£5.6m	£6.3m	£6.4m
Operating profit	£838k	£990k	£1.5m	£1.2m
Profit before tax	£767k	£872k	£1.3m	£1.1m
Profit after tax	£763k	£763k	£1m	£384k
Profit (best available)	£763k	£763k	£1m	£384k
Staff costs	£3.4m	£3.9m	£4.4m	£5m
Employees (average)	96	75	79	87
Ratios
Profit margin	9.6%	6.6%	8.3%	2.9%
Gross margin	38.6%	47.8%	50.6%	49.2%
Revenue per employee	£83k	£155k	£157k	£150k
Profit per employee	£8k	£10.2k	£13k	£4.4k
Growth (year on year)
Revenue growth	—	▲46.2%	▲6.6%	▲4.7%
Profit growth	—	▼0%	▲34.7%	▼62.7%
Headcount growth	—	▼21.9%	▲5.3%	▲10.1%
Balance sheet — indirect signals, not revenue
Cash at bank	£116k	£12.7k	£132k	£643k
Net assets	£12.6m	£13.4m	£14.4m	£14.6m
Fixed assets	£3m	£2.3m	£2.4m	£2m
Current assets	£14.3m	£15m	£15.5m	£14.9m
Debtors	£3m	£2.9m	£2.7m	£1.9m
Deferred income	£291k	£253k	£162k	£188k
Source	Accounts · bulk data Jan 2024	Accounts · bulk data Jan 2024	FullAccounts · bulk data Jan 2025	FullAccounts · bulk data Jan 2026

Derived from the latest filing

How the business works

Profit margin: 2.9%; Profit ÷ revenue.
Gross margin: 49.2%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £150k; Revenue ÷ average employees.
Profit per employee: £4.4k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 15.6%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 1.5%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 14.8%; 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: ▲1%; Now £14.6m
Cash at bank: ▲388%; Now £643k
Headcount: ▲10%; Now 87
Deferred income: ▲16%; Now £188k
Fixed assets: ▼15%; Now £2m

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

WJ Management Limitedultimate parent75–100%
WJ Groundwater Limitedthis company

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

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

Same industry, similar size

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 30 Apr 2025 (profit £384k), from the Companies House accounts bulk data published Jan 2026. Spotted an error? Request a correction.

Updated from Companies House on 25 Oct 2026

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