- Companies
- Civil engineering
- Southampton
- Whitman Builders Southern Ltd
Whitman Builders Southern Ltd
- Company number
- 16289675
- Incorporated
- 4 Mar 20251 year trading
- Registered office
- 11 Tenterton Avenue, Southampton, SO19 9HT
- Nature of business
- Construction of other civil engineering projects n.e.c.
Whitman Builders Southern Ltd is a 1-year-old private limited company registered in Southampton, company number 16289675, one of 114 civil engineering contractors in Southampton. Its next accounts are due at Companies House on 4 December 2026, and its first CT600 is due at HMRC on 3 March 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.
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Where Whitman Builders Southern Ltd is registered
The registered office is in Southampton (SO19), in the Southampton local authority area, South East. Show SO19 9HT on a map.
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Also registered at this address
1 other company uses the same registered office as Whitman Builders Southern Ltd.
- Whitman Builders LtdCivil engineering
What happens if Whitman Builders Southern 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 4 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 5 Dec 2026 to 4 Jan 2027 | £150 |
| 1 to 3 months late | 5 Jan 2027 to 4 Mar 2027 | £375 |
| 3 to 6 months late | 5 Mar 2027 to 4 Jun 2027 | £750 |
| More than 6 months late | From 5 Jun 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
- 16289675
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 March 2025 (1 year ago)
- Registered office
- 11 Tenterton Avenue, Southampton, SO19 9HT
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 3 March 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 Southampton
Other active civil engineering contractors registered in Southampton.
- Williams Tucker Limited2023
- Winchester Highways Limited2021
- WN Construction Limited2016
- WSCC Limited2013
- XK Structures Ltd2020
- Zemytm Ltd2026
- 3 Counties Civil Engineering Limited2000
- A Builder (Netley) Limited2007
All civil engineering contractors in Southampton · All trades in Southampton · Civil engineering across the UK
Frequently asked questions
When are Whitman Builders Southern Ltd's accounts due?
Whitman Builders Southern Ltd's next accounts are due at Companies House by 4 December 2026 (in 52 days), covering the period to 31 March 2026.
When is Whitman Builders Southern Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 3 March 2026, due by 3 March 2027, 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 Whitman Builders Southern Ltd still trading?
Whitman Builders Southern Ltd 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 Whitman Builders Southern Ltd do?
Whitman Builders Southern Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Whitman Builders Southern Ltd?
Whitman Builders Southern Ltd was incorporated on 4 March 2025, 1 year ago.
What is the penalty if Whitman Builders Southern 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 Whitman Builders Southern Ltd 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.