How much does Harmonix Construction Limited make?

Harmonix Construction Limited reported revenue of £30.5m and £1.1m profit in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does Harmonix Construction Limited have?

Harmonix Construction Limited reported an average of 29 employees in the year to 31 Mar 2025.

Is Harmonix Construction Limited profitable?

Yes — Harmonix Construction Limited reported a profit of £1.1m in the year to 31 Mar 2025.

Company No. 03845271 · Incorporated 21 Sep 1999

Harmonix Construction Limited

Registered name: HARMONIX CONSTRUCTION LIMITED

Part of Harmonix Construction Group Limited group

Harmonix Construction Limited made £30.5m revenue and £1.1m profit in the year to 31 Mar 2025.

Harmonix Construction Limited’s revenue fell 11% to £30.5m in the year to 31 Mar 2025, with £1.1m profit and 29 employees. The company is classified under “construction of commercial buildings” and is based in Bromley; we hold 3 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 41201Construction of commercial buildings

Status: Active
Location: Bromley, London
Age: 27 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. From the filing: “The company is controlled by the trustees of Harmonix Construction Limited being the corporate trustee of The Harmonix Employee Ownership Trust.”

Latest accounts · year to 31 Mar 2025

Key figures

Capital-lightCash flow filed

Revenue

£30.5m

Growth ▼11.1%

Profit

£1.1m

Growth ▼65.1%

Profit margin

3.6%

Gross 8.4%

Employees

Change ▲16%

Profit / employee

£38.4k

Revenue/employee £1.1m

Profitable streak

3yrs

Consecutive profitable years in our data

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

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Mar 2023	31 Mar 2024	31 Mar 2025
Disclosure	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£34.5m	£34.3m	£30.5m
Cost of sales	£31.5m	£28.8m	£28m
Gross profit	£3m	£5.6m	£2.6m
Operating profit	£1.8m	£4.2m	£1.4m
Profit before tax	£1.8m	£4.3m	£1.5m
Profit after tax	£1.4m	£3.2m	£1.1m
Profit (best available)	£1.4m	£3.2m	£1.1m
Employees (average)	29	25	29
Ratios
Profit margin	4.2%	9.3%	3.6%
Gross margin	8.8%	16.2%	8.4%
Revenue per employee	£1.2m	£1.4m	£1.1m
Profit per employee	£49.8k	£128k	£38.4k
Cash conversion	−77.8%	98.2%	122.9%
Growth (year on year)
Revenue growth	—	▼0.4%	▼11.1%
Profit growth	—	▲120.9%	▼65.1%
Headcount growth	—	▼13.8%	▲16%
Balance sheet — indirect signals, not revenue
Cash at bank	£1.6m	£3.8m	£4.6m
Net assets	£2.5m	£3.7m	£3.8m
Fixed assets	£36.8k	£26.8k	£20.1k
Current assets	£6.6m	£10.2m	£10.4m
Debtors	£2.8m	£5.2m	£2.3m
Deferred income	£2.9m	£4.8m	£5.4m
Cash from operations	−£1.4m	£4.1m	£1.7m
Source	Accounts · bulk data Nov 2024	Accounts · bulk data Nov 2024	FullAccounts · bulk data Dec 2025

Derived from the latest filing

How the business works

Profit margin: 3.6%; Profit ÷ revenue.
Gross margin: 8.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £1.1m; Revenue ÷ average employees.
Profit per employee: £38.4k; Profit ÷ average employees.
Cash conversion: 122.9%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 0.1%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 17.7%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 7.5%; 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: ▲3%; Now £3.8m
Cash at bank: ▲22%; Now £4.6m
Headcount: ▲16%; Now 29
Deferred income: ▲14%; Now £5.4m
Fixed assets: ▼25%; Now £20.1k

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

Harmonix Construction Group Limitedultimate parent75–100%
Harmonix Construction Limitedthis company

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

Subsidiaries (1)

The Trustees of Harmonix Construction LimitedFigures not disclosed

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

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Mar 2025 (profit £1.1m), 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.