How much does Imperial Ductwork Services Limited make?

Imperial Ductwork Services Limited reported revenue of £50.4m and £2m profit in the year to 31 Jul 2025, according to its accounts filed at Companies House.

How many employees does Imperial Ductwork Services Limited have?

Imperial Ductwork Services Limited reported an average of 65 employees in the year to 31 Jul 2025.

Is Imperial Ductwork Services Limited profitable?

Yes — Imperial Ductwork Services Limited reported a profit of £2m in the year to 31 Jul 2025.

Company No. 03402613 · Incorporated 11 Jul 1997

Imperial Ductwork Services Limited

Registered name: IMPERIAL DUCTWORK SERVICES LIMITED

Part of Idsh Limited group

Imperial Ductwork Services Limited made £50.4m revenue and £2m profit in the year to 31 Jul 2025.

Imperial Ductwork Services Limited’s revenue grew 32% to £50.4m in the year to 31 Jul 2025, with £2m profit and 65 employees. The company is classified under “other specialised construction activities” and is based in Sidcup; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 43999Other specialised construction activities n.e.c.

Status: Active
Location: Sidcup, South East
Age: 29 yrs · since 1997
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 Jul 2025

Key figures

Capital-lightOperating leverageBoring industryCash flow filed

Revenue

£50.4m

Growth ▲31.9%

Profit

£2m

Growth ▲119.3%

Profit margin

Gross 18.8%

Employees

Change 0%

Profit / employee

£31.4k

Revenue/employee £775k

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 Jul 2022	31 Jul 2023	31 Jul 2024	31 Jul 2025
Disclosure	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£38.3m	£39.6m	£38.2m	£50.4m
Cost of sales	£33m	£33.8m	£32.3m	£40.9m
Gross profit	£5.3m	£5.8m	£6m	£9.5m
Operating profit	£1.2m	£702k	£1m	£2.6m
Profit before tax	£1.2m	£733k	£1.1m	£2.7m
Profit after tax	£1.1m	£721k	£931k	£2m
Profit (best available)	£1.1m	£721k	£931k	£2m
Staff costs	£2.9m	£2.9m	£2.9m	£4.4m
Employees (average)	53	50	65	65
Ratios
Profit margin	2.9%	1.8%	2.4%	4%
Gross margin	13.9%	14.6%	15.6%	18.8%
Revenue per employee	£723k	£792k	£588k	£775k
Profit per employee	£20.9k	£14.4k	£14.3k	£31.4k
Cash conversion	219.3%	107.9%	77.2%	145.6%
Growth (year on year)
Revenue growth	—	▲3.4%	▼3.6%	▲31.9%
Profit growth	—	▼34.9%	▲29%	▲119.3%
Headcount growth	—	▼5.7%	▲30%	0%
Balance sheet — indirect signals, not revenue
Cash at bank	£1.9m	£1.9m	£1.8m	£4.5m
Net assets	£5.2m	£5.3m	£5.2m	£6.2m
Fixed assets	£66.5k	£145k	£128k	£151k
Current assets	£15.9m	£13.4m	£14.7m	£24m
Debtors	£4.6m	£3.1m	£4.3m	£7.6m
Deferred income	£18k	£23.3k	£22k	£7m
Cash from operations	£2.6m	£757k	£795k	£3.8m
Source	Accounts · bulk data Feb 2024	Accounts · bulk data Feb 2024	FullAccounts · bulk data Jan 2025	FullAccounts · bulk data Feb 2026

Derived from the latest filing

How the business works

Profit margin: 4%; Profit ÷ revenue.
Gross margin: 18.8%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £775k; Revenue ÷ average employees.
Profit per employee: £31.4k; Profit ÷ average employees.
Cash conversion: 145.6%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 0.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 13.9%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 15%; 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: ▲20%; Now £6.2m
Cash at bank: ▲149%; Now £4.5m
Headcount: 0%; Now 65
Deferred income: ▲31623%; Now £7m
Fixed assets: ▲18%; Now £151k

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

Idsh Limitedultimate parent75–100%
Imperial Ductwork Services Holdings Limited75–100%
Imperial Ductwork Services Limitedthis company

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

Sister companies (1)

Imperial Hygiene Solutions LimitedFigures not disclosed

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 31 Jul 2025 (profit £2m), from the Companies House accounts bulk data published Feb 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.