1. Companies
  2. Civil engineering
  3. Belfast
  4. Lagan Specialist International Limited

Lagan Specialist International Limited

ActiveNo accounts filed yet accountsCivil engineeringBelfast
Company number
NI738004
Incorporated
18 Feb 2026
Registered office
Rosemount House, 21-23 Sydenham Road, Belfast, BT3 9HA
Nature of business
Construction of roads and motorways; Construction of other civil engineering projects n.e.c.
Accounts due in
400 days
18 Nov 2027
From the Companies House register, 1 Oct 2026

Lagan Specialist International Limited is a newly incorporated private limited company registered in Belfast, company number NI738004, one of 67 civil engineering contractors in Belfast. Its next accounts are due at Companies House on 18 November 2027, and its first CT600 is due at HMRC on 17 February 2028.

Key dates

This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.

Accounts due
18 Nov 2027
in 400 days
For the period to 28 Feb 2027
CT600 due (first of two)
17 Feb 2028
in 491 days
Period 18 Feb 2026 to 17 Feb 2027
CT600 due (second of two)
28 Feb 2028
in 502 days
Period 18 Feb 2027 to 28 Feb 2027
Corporation tax payment
1 Dec 2027
in 413 days
9 months and 1 day after the period end
Confirmation statement
3 Mar 2027
in 140 days

Is this your company?

File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.

File for Lagan Specialist International Limited

Or get a reminder before each deadline

Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.

Where Lagan Specialist International Limited is registered

Lagan Specialist International Limited's registered office on a map of the UK

The registered office is in Belfast (BT3), in the Belfast local authority area, Northern Ireland. Show BT3 9HA on a map.

Other trade companies in BT3

Also registered at this address

11 other companies use the same registered office as Lagan Specialist International Limited.

What happens if Lagan Specialist International Limited files late

Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 18 November 2027.

Companies HouseAccounts deliveredPenalty
Up to 1 month late19 Nov 2027 to 18 Dec 2027£150
1 to 3 months late19 Dec 2027 to 18 Feb 2028£375
3 to 6 months late19 Feb 2028 to 18 May 2028£750
More than 6 months lateFrom 19 May 2028£1,500

Penalties double if the accounts were also late the year before.

HMRC (CT600)FromPenalty
1 day late29 Feb 2028£200
3 months late28 May 2028another £200
6 months late28 Aug 2028HMRC estimates the tax and adds 10% of the unpaid tax
12 months late28 Feb 2029another 10% of any unpaid tax

For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.

Company details

As held on the Companies House register.

Company number
NI738004
Status
Active
Company type
Private limited company
Incorporated
18 February 2026
Registered office
Rosemount House, 21-23 Sydenham Road, Belfast, BT3 9HA
Nature of business
Construction of roads and motorways (SIC 42110)
Construction of other civil engineering projects n.e.c. (SIC 42990)
Year end
28 February (accounting reference date)
Accounts type
No accounts filed yet
Charges (mortgages)
1 outstanding of 1 registered

Filing notes for civil engineering contractors

Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.

Similar companies in Belfast

Other active civil engineering contractors registered in Belfast.

All civil engineering contractors in Belfast · All trades in Belfast · Civil engineering across the UK

Frequently asked questions

When are Lagan Specialist International Limited's accounts due?

Lagan Specialist International Limited's next accounts are due at Companies House by 18 November 2027 (in 400 days), covering the period to 28 February 2027.

When is Lagan Specialist International Limited's CT600 due?

The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 17 February 2027, due by 17 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.

Is Lagan Specialist International Limited still trading?

Lagan Specialist International Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.

What does Lagan Specialist International Limited do?

Lagan Specialist International Limited is registered under Construction of roads and motorways (SIC 42110); Construction of other civil engineering projects n.e.c. (SIC 42990).

How old is Lagan Specialist International Limited?

Lagan Specialist International Limited was incorporated on 18 February 2026, less than a year ago.

What is the penalty if Lagan Specialist International Limited files its accounts late?

Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.

Official records

View Lagan Specialist International Limited on Companies House for filed documents, officers and the full history.

Report an error on this page

Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.

File accounts + CT600File now£49Let's talk