Gem Environmental Building Services Limited
Registered name: GEM ENVIRONMENTAL BUILDING SERVICES LIMITED
Part of JTMM Investments Limited groupGem Environmental Building Services Limited made £28.8m revenue and £1.6m profit in the year to 30 Jun 2025.
Gem Environmental Building Services Limited’s revenue was £28.8m in the year to 30 Jun 2025, with £1.6m profit and 140 employees. The company is classified under “business and domestic software development” and is based in London; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 26 yrs · since 1999
- 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 | 31 Mar 2023 | 30 Jun 2024 | 30 Jun 2025 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £22.7m | £27m | £28.8m |
| Cost of sales | £17.2m | £20.2m | £19.7m |
| Gross profit | £5.5m | £6.8m | £9.1m |
| Operating profit | −£1.7m | −£3.1m | — |
| Profit before tax | −£1.7m | −£3.3m | £1.2m |
| Profit after tax | −£843k | −£3.3m | £1.6m |
| Profit (best available) | −£843k | −£3.3m | £1.6m |
| Staff costs | £7.4m | £9.4m | £7.7m |
| Employees (average) | 146 | 141 | 140 |
| Ratios | |||
| Profit margin | −3.7% | −12.2% | 5.7% |
| Gross margin | 24.3% | 25.2% | 31.5% |
| Revenue per employee | £155k | £191k | £206k |
| Profit per employee | −£5.8k | −£23.4k | £11.8k |
| Balance sheet — indirect signals, not revenue | |||
| Cash at bank | £228k | £64.9k | £942k |
| Net assets | £609k | −£2.7m | −£984k |
| Fixed assets | £318k | £126k | £106k |
| Current assets | £7.8m | £7.8m | £13.5m |
| Debtors | £1.1m | £1.4m | £1.9m |
| Deferred income | — | £940k | £5.4m |
| Source | FullAccounts · bulk data Sep 2025 | FullAccounts · bulk data Sep 2025 | FullAccounts · bulk data Sep 2025 |
How the business works
- Profit margin
- 5.7%
- Profit ÷ revenue.
- Gross margin
- 31.5%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £206k
- Revenue ÷ average employees.
- Profit per employee
- £11.8k
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 0.4%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 18.9%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 6.7%
- 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 −£984k
- Cash at bank
- —
- Now £942k
- Headcount
- —
- Now 140
- Deferred income
- —
- Now £5.4m
- Fixed assets
- —
- Now £106k
Group structure
Ownership chain
- JTMM Investments Limitedultimate parent75–100%
- Socius Investments Limited75–100%
- Gem Environmental Building Services Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (1)
- Gem Newco LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
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Sources
Latest figures from FullAccounts for the year to 30 Jun 2025 (profit £1.6m), from the Companies House accounts bulk data published Sep 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.