- Company number
- 16726743
- Incorporated
- 18 Sep 20251 year trading
- Registered office
- 119 Dawley Road, Hayes, UB3 1LZ
- Nature of business
- Construction of commercial buildings
PB03 Improvement Service Ltd is a 1-year-old private limited company registered in Hayes, company number 16726743, one of 850 building contractors in Hayes. Its next accounts are due at Companies House on 30 June 2028, and the CT600 for the period to 30 September 2027 is due at HMRC on 30 September 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where PB03 Improvement Service Ltd is registered
The registered office is in Hayes (UB3), in the Hillingdon local authority area, London. Show UB3 1LZ on a map.
Other trade companies in UB3
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- KSJ Design & Build LtdBuilders
- KCRQ LimitedCleaning companies
- HKR Roofing LtdRoofers
- Syg Development Group LtdProperty developers
- Ironspan Industrial Services LtdMachinery repair and installation
- RK9 LimitedBuilders
- Elite Construction and Roofing LimitedBuilders
What happens if PB03 Improvement Service Ltd 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 30 June 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2028 to 31 Jul 2028 | £150 |
| 1 to 3 months late | 1 Aug 2028 to 30 Sep 2028 | £375 |
| 3 to 6 months late | 1 Oct 2028 to 31 Dec 2028 | £750 |
| More than 6 months late | From 1 Jan 2029 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2028 | £200 |
| 3 months late | 30 Dec 2028 | another £200 |
| 6 months late | 30 Mar 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 2029 | 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
- 16726743
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 September 2025 (1 year ago)
- Registered office
- 119 Dawley Road, Hayes, UB3 1LZ
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last accounts made up to
- 30 September 2026
- Last confirmation statement
- 17 September 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 Hayes
Other active building contractors registered in Hayes.
- PB05 Construction Ltd2023
- PB07 Group Ltd2024
- PB08 Builders Ltd2025
- PB46 Construction Ltd2024
- Pearl Infra Ltd2020
- Perfect Building Ltd2023
- Phoenix MBC Props Ltd2025
- Pivotal Builds LC Limited2020
All building contractors in Hayes · All trades in Hayes · Builders across the UK
Frequently asked questions
When are PB03 Improvement Service Ltd's accounts due?
PB03 Improvement Service Ltd's next accounts are due at Companies House by 30 June 2028 (in 626 days), covering the period to 30 September 2027.
When is PB03 Improvement Service Ltd's CT600 due?
The CT600 for the period to 30 September 2027 is due at HMRC by 30 September 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2028.
Is PB03 Improvement Service Ltd still trading?
PB03 Improvement Service Ltd is listed as active on the Companies House register (checked 13 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 PB03 Improvement Service Ltd do?
PB03 Improvement Service Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is PB03 Improvement Service Ltd?
PB03 Improvement Service Ltd was incorporated on 18 September 2025, 1 year ago.
What is the penalty if PB03 Improvement Service Ltd 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 PB03 Improvement Service Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.