- Company number
- 11924211
- Incorporated
- 3 Apr 20197 years trading
- Registered office
- South Street House, 51 South Street, Isleworth, Middlesex, TW7 7AA
- Nature of business
- Construction of commercial buildings; Plumbing, heat and air-conditioning installation; Floor and wall covering; Painting
Olteanu Building Limited is a 7-year-old private limited company registered in Isleworth, company number 11924211, one of 132 building contractors in Isleworth. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 2027.
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 down £295 (-20%) on the year before, to £1,180.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £2,616 against £6,299 owed within a year: 0.4 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £1,180 | £2,616 | £6,299 | 2 | |
| 30 Apr 2024 | £1,475 | £990 | £5,616 | 2 | |
| 30 Apr 2023 | -£2,274 | £7,931 | £9,485 | 2 | |
| 30 Apr 2022 | -£5,231 | £3,486 | £8,267 | 2 | |
| 30 Apr 2021 | -£6,325 | £2,338 | £8,213 | 2 | |
| 30 Apr 2020 | -£2,867 | £2,583 | £5,000 | 2 |
Where Olteanu Building Limited is registered
The registered office is in Isleworth (TW7), in the Hounslow local authority area, London. Show TW7 7AA on a map.
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- Gio Construction LimitedBuilders
- S & H Bodywork LtdMechanics and garages
- KS Garage Isleworth LtdMotor traders
- C Wiseman Services LtdCleaning companies
- Avenida Developments LtdProperty developers
- Courtesy Cars Group UK LtdMotor traders
Also registered at this address
4 other companies use the same registered office as Olteanu Building Limited.
- Atlas Gas LtdPlumbers and heating engineers
- New Acre Electrical LimitedElectricians
- Tachbrook Builders LimitedProperty developers
- TMM Design & Project Management Services LimitedSpecialist contractors
What happens if Olteanu Building 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 11924211
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 April 2019 (7 years ago)
- Registered office
- South Street House, 51 South Street, Isleworth, Middlesex, TW7 7AA
- Nature of business
- Construction of commercial buildings (SIC 41201)
Plumbing, heat and air-conditioning installation (SIC 43220)
Floor and wall covering (SIC 43330)
Painting (SIC 43341) - Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 8 April 2026
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 Isleworth
Other active building contractors registered in Isleworth.
- Orpington Management Company Ltd2018
- Parkway Developments Limited1993
- Pinnacle Building and Roofing Limited2012
- PR City Construction Limited2021
- Premier Grounds & Building Care Ltd2024
- Premier Quality Construction Ltd2023
- Property JK Limited2025
- Property Plus Construction Limited2018
All building contractors in Isleworth · All trades in Isleworth · Builders across the UK
Frequently asked questions
When are Olteanu Building Limited's accounts due?
Olteanu Building Limited's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Olteanu Building Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Olteanu Building Limited still trading?
Olteanu Building 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 Olteanu Building Limited do?
Olteanu Building Limited is registered under Construction of commercial buildings (SIC 41201); Plumbing, heat and air-conditioning installation (SIC 43220); Floor and wall covering (SIC 43330); Painting (SIC 43341).
How old is Olteanu Building Limited?
Olteanu Building Limited was incorporated on 3 April 2019, 7 years ago.
What is the penalty if Olteanu Building 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 Olteanu Building 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.