Proteus Waterproofing Limited
Registered name: PROTEUS WATERPROOFING LIMITED
Part of Proteus Trustee Limited groupProteus Waterproofing Limited made £13m revenue and £922k profit in the year to 30 Apr 2025.
Proteus Waterproofing Limited’s revenue grew 1% to £13m in the year to 30 Apr 2025, with £922k profit and 40 employees. The company is classified under “other specialised construction activities” and is based in Leigh-on-Sea; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Leigh-on-Sea, East of England
- Age
- 13 yrs · since 2013
- 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.
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 30 Apr 2022 | 30 Apr 2023 | 30 Apr 2024 | 30 Apr 2025 |
|---|---|---|---|---|
| Disclosure | No P&L | No P&L | Full P&L | Full P&L |
| Profit & loss | ||||
| Revenue (turnover) | — | — | £12.9m | £13m |
| Cost of sales | — | — | −£6.9m | −£6.4m |
| Gross profit | — | — | £6.1m | £6.6m |
| Operating profit | — | — | £1.5m | £1.4m |
| Profit before tax | — | — | £1.4m | £1.3m |
| Profit after tax | — | — | £1m | £922k |
| Profit (best available) | — | — | £1m | £922k |
| Employees (average) | 28 | 38 | 40 | 40 |
| Ratios | ||||
| Profit margin | — | — | 7.8% | 7.1% |
| Gross margin | — | — | 47% | 50.6% |
| Revenue per employee | — | — | £323k | £325k |
| Profit per employee | — | — | £25.1k | £23.1k |
| Growth (year on year) | ||||
| Revenue growth | — | — | — | ▲0.6% |
| Profit growth | — | — | — | ▼8.2% |
| Headcount growth | — | ▲35.7% | ▲5.3% | 0% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £1.6m | £1.6m | — | — |
| Net assets | £2.8m | £2.9m | — | — |
| Fixed assets | £2m | £2.2m | — | — |
| Current assets | £3.8m | £3.6m | — | — |
| Debtors | £1.1m | £511k | — | — |
| Source | FullAccounts · bulk data Jan 2024 | FullAccounts · bulk data Jan 2024 | Accounts · bulk data Mar 2026 | Accounts · bulk data Mar 2026 |
How the business works
- Profit margin
- 7.1%
- Profit ÷ revenue.
- Gross margin
- 50.6%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £325k
- Revenue ÷ average employees.
- Profit per employee
- £23.1k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- —
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- —
- Money owed by customers. Low = customers pay quickly.
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
- —
- Now —
- Cash at bank
- —
- Now —
- Headcount
- 0%
- Now 40
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Proteus Trustee Limitedultimate parent75–100%
- Proteus Waterproofing 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).
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Sources
Latest figures from accounts for the year to 30 Apr 2025 (profit £922k), from the Companies House accounts bulk data published Mar 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.