- Company number
- 11111650
- Incorporated
- 14 Dec 20178 years trading
- Registered office
- 1 Eastcote Lane, Harrow, HA2 8BW
- Nature of business
- Construction of domestic buildings
H Carolan Construction Limited is a 8-year-old private limited company registered in Harrow, company number 11111650, one of 793 building contractors in Harrow. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £42K (+12.4%) on the year before, to £384K.
- Net assets rose in 6 of 6 year-on-year comparisons on record.
- Current assets of £845K against £464K owed within a year: 1.8 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2018 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | £384K | £46K | £845K | £464K | 0 |
| 31 Dec 2023 | £341K | £4,972 | £819K | £414K | 4 |
| 31 Dec 2022 | £199K | £3,961 | £886K | £545K | 4 |
| 31 Dec 2021 | £141K | £48K | £755K | £458K | 4 |
| 31 Dec 2020 | £100K | £422K | £189K | 4 | |
| 31 Dec 2019 | £59K | £235K | £185K | 4 | |
| 31 Dec 2018 | £8,875 | £131K | £135K | 4 |
Public contracts won
H Carolan Construction Limited has 4 public sector contract awards on record; the ones with their own published value total £1.6M, from 2018 to 2021. Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- London Borough of Ealing4 awards
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| London Borough of Ealing | EC1351 - Fielding Primary School | £1.4M | 4 Aug 2021 |
| London Borough of Ealing | EC1343/SSP160 Hambrough Primary School | £82K | 1 Jul 2019 |
| London Borough of Ealing | Allenby Primary School - Reception Toilets Replacement | £52K | 16 May 2019 |
| London Borough of Ealing | Wolf Fields Primary School - Fire Doors, Fencing and Gates and Lightning Protection | £101K | 6 Jul 2018 |
Where H Carolan Construction Limited is registered
The registered office is in Harrow (HA2), in the Harrow local authority area, London. Show HA2 8BW on a map.
Other trade companies in HA2
- KJP Engineering LtdElectricians
- JNJ Engineering LimitedCivil engineering
- Notting Hill Sew LtdRepair services
- Grandwellautos LtdMotor traders
- Multisteel Powdercoating LtdPainters and decorators
- Neon Systems LtdElectricians
- Firstclass Facilities LtdCleaning companies
- PMD Construct LtdBuilders
Also registered at this address
1 other company uses the same registered office as H Carolan Construction Limited.
- Carolan Developments LtdBuilders
What happens if H Carolan Construction 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2028 | another 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
- 11111650
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 December 2017 (8 years ago)
- Registered office
- 1 Eastcote Lane, Harrow, HA2 8BW
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 16 May 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Harrow
Other active building contractors registered in Harrow.
- H&B Buildings Services Limited2025
- Hadasa Limited2017
- Halsall Homes Limited1999
- Handyserv Ltd.2015
- Hansavest UK Limited2025
- Hapca Construct Ltd2025
- Happy Home Contractors Ltd2023
- Hari CS Ltd2018
All building contractors in Harrow · All trades in Harrow · Builders across the UK
Frequently asked questions
When are H Carolan Construction Limited's accounts due?
H Carolan Construction Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is H Carolan Construction 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 31 December 2025, due by 31 December 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is H Carolan Construction Limited still trading?
H Carolan Construction 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 H Carolan Construction Limited do?
H Carolan Construction Limited is registered under Construction of domestic buildings (SIC 41202).
How old is H Carolan Construction Limited?
H Carolan Construction Limited was incorporated on 14 December 2017, 8 years ago.
Has H Carolan Construction Limited won public sector contracts?
Yes. H Carolan Construction Limited has 4 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.6M), most recently from London Borough of Ealing.
What is the penalty if H Carolan Construction 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 H Carolan Construction Limited on Companies House for filed documents, officers and the full history.
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.