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  4. Arkhitekton Energy Limited

Arkhitekton Energy Limited

ActiveNo accounts filed yet accountsCivil engineeringLondon
Company number
16859110
Incorporated
17 Nov 2025
Registered office
Quadrant House Floor 6, 4 Thomas More Square, London, E1W 1YW
Nature of business
Construction of utility projects for electricity and telecommunications; Electrical installation; Activities of other holding companies n.e.c.; Financial intermediation not elsewhere classified
Accounts due in
307 days
17 Aug 2027
From the Companies House register, 1 Oct 2026

Arkhitekton Energy Limited is a newly incorporated private limited company registered in London, company number 16859110, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 17 August 2027, and its first CT600 is due at HMRC on 16 November 2027.

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
17 Aug 2027
in 307 days
For the period to 30 Nov 2026
CT600 due (first of two)
16 Nov 2027
in 398 days
Period 17 Nov 2025 to 16 Nov 2026
CT600 due (second of two)
30 Nov 2027
in 412 days
Period 17 Nov 2026 to 30 Nov 2026
Corporation tax payment
1 Sep 2027
in 322 days
9 months and 1 day after the period end
Confirmation statement
29 Sep 2027
in 350 days
Last made up to 15 Sep 2026

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Where Arkhitekton Energy Limited is registered

Arkhitekton Energy Limited's registered office on a map of the UK

The registered office is in London (E1W), in the Tower Hamlets local authority area, London. Show E1W 1YW on a map.

Other trade companies in E1W

Also registered at this address

23 other companies use the same registered office as Arkhitekton Energy Limited.

What happens if Arkhitekton Energy 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 17 August 2027.

Companies HouseAccounts deliveredPenalty
Up to 1 month late18 Aug 2027 to 17 Sep 2027£150
1 to 3 months late18 Sep 2027 to 17 Nov 2027£375
3 to 6 months late18 Nov 2027 to 17 Feb 2028£750
More than 6 months lateFrom 18 Feb 2028£1,500

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

HMRC (CT600)FromPenalty
1 day late1 Dec 2027£200
3 months late29 Feb 2028another £200
6 months late30 May 2028HMRC estimates the tax and adds 10% of the unpaid tax
12 months late30 Nov 2028another 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
16859110
Status
Active
Company type
Private limited company
Incorporated
17 November 2025
Registered office
Quadrant House Floor 6, 4 Thomas More Square, London, E1W 1YW
Nature of business
Construction of utility projects for electricity and telecommunications (SIC 42220)
Electrical installation (SIC 43210)
Activities of other holding companies n.e.c. (SIC 64209)
Financial intermediation not elsewhere classified (SIC 64999)
Year end
30 November (accounting reference date)
Accounts type
No accounts filed yet
Last confirmation statement
15 September 2026

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 London

Other active civil engineering contractors registered in London.

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

Frequently asked questions

When are Arkhitekton Energy Limited's accounts due?

Arkhitekton Energy Limited's next accounts are due at Companies House by 17 August 2027 (in 307 days), covering the period to 30 November 2026.

When is Arkhitekton Energy 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 16 November 2026, due by 16 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.

Is Arkhitekton Energy Limited still trading?

Arkhitekton Energy 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 Arkhitekton Energy Limited do?

Arkhitekton Energy Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220); Electrical installation (SIC 43210); Activities of other holding companies n.e.c. (SIC 64209); Financial intermediation not elsewhere classified (SIC 64999).

How old is Arkhitekton Energy Limited?

Arkhitekton Energy Limited was incorporated on 17 November 2025, less than a year ago.

What is the penalty if Arkhitekton Energy 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 Arkhitekton Energy 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.

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