How much does Niblock (Builders) Limited make?

Niblock (Builders) Limited reported revenue of £23.2m and £833k profit in the year to 30 Sep 2025, according to its accounts filed at Companies House.

Is Niblock (Builders) Limited profitable?

Yes — Niblock (Builders) Limited reported a profit of £833k in the year to 30 Sep 2025.

Company No. 00633825 · Incorporated 29 Jul 1959

Niblock (Builders) Limited

Registered name: NIBLOCK (BUILDERS) LIMITED

Niblock (Builders) Limited made £23.2m revenue and £833k profit in the year to 30 Sep 2025.

Niblock (Builders) Limited’s revenue grew 19% to £23.2m in the year to 30 Sep 2025, with £833k profit. The company is classified under “construction of commercial buildings” and is based in London; we hold 3 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 41201Construction of commercial buildings SIC 41202Construction of domestic buildings SIC 42990Construction of other civil engineering projects n.e.c.

Status: Active
Location: London, London
Age: 67 yrs · since 1959
Type: Private Limited Company

Latest accounts · year to 30 Sep 2025

Key figures

IndependentOperating leverage

Revenue

£23.2m

Growth ▲18.6%

Profit

£833k

Growth ▲55.9%

Profit margin

3.6%

Gross 25.2%

Employees

—

Change —

Profit / employee

—

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	30 Sep 2023	30 Sep 2024	30 Sep 2025
Disclosure	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£18.8m	£19.5m	£23.2m
Cost of sales	−£15.3m	−£15.2m	−£17.3m
Gross profit	£3.5m	£4.4m	£5.8m
Operating profit	£398k	£745k	£1m
Profit before tax	£375k	£743k	£1m
Profit after tax	£274k	£535k	£833k
Profit (best available)	£274k	£535k	£833k
Employees (average)	—	—	—
Ratios
Profit margin	1.5%	2.7%	3.6%
Gross margin	18.7%	22.4%	25.2%
Growth (year on year)
Revenue growth	—	▲3.7%	▲18.6%
Profit growth	—	▲94.8%	▲55.9%
Balance sheet — indirect signals, not revenue
Net assets	—	—	—
Source	Accounts · bulk data May 2025	Accounts · bulk data May 2025	Accounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: 3.6%; Profit ÷ revenue.
Gross margin: 25.2%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: —; Revenue ÷ average employees.
Profit per employee: —; 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.

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: —; Now —
Cash at bank: —; Now —
Headcount: —; Now —
Deferred income: —; Now —
Fixed assets: —; Now —

Corporate ownership

Group structure

Subsidiaries (1)

Niblock Electrical Services 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 accounts for the year to 30 Sep 2025 (profit £833k), from the Companies House accounts bulk data published Jul 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.