- Companies
- Civil engineering
- Welwyn Garden City
- First Line Drains Ltd
First Line Drains Ltd
- Company number
- 16106282
- Incorporated
- 27 Nov 20241 year trading
- Registered office
- 31 Sloansway, Welwyn Garden City, AL7 1NA
- Nature of business
- Construction of utility projects for fluids; Construction of other civil engineering projects n.e.c.
First Line Drains Ltd is a 1-year-old private limited company registered in Welwyn Garden City, company number 16106282, one of 15 civil engineering contractors in Welwyn Garden City. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where First Line Drains Ltd is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 1NA on a map.
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What happens if First Line Drains 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16106282
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 November 2024 (1 year ago)
- Registered office
- 31 Sloansway, Welwyn Garden City, AL7 1NA
- Nature of business
- Construction of utility projects for fluids (SIC 42210)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 26 November 2025
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 Welwyn Garden City
Other active civil engineering contractors registered in Welwyn Garden City.
- Fortis Foundations Civil Engineering Ltd2020
- Highways (UK) Limited2011
- Jointing Solutions Ltd2025
- MD-Decorators Limited2019
- Megalight Technologies Ltd2022
- Mmae Engineering Ltd2022
- Nowak Carpenters Ltd2019
- Oms Utilities Ltd2023
All civil engineering contractors in Welwyn Garden City · All trades in Welwyn Garden City · Civil engineering across the UK
Frequently asked questions
When are First Line Drains Ltd's accounts due?
First Line Drains Ltd's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is First Line Drains Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is First Line Drains Ltd still trading?
First Line Drains 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 First Line Drains Ltd do?
First Line Drains Ltd is registered under Construction of utility projects for fluids (SIC 42210); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is First Line Drains Ltd?
First Line Drains Ltd was incorporated on 27 November 2024, 1 year ago.
What is the penalty if First Line Drains 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 First Line Drains 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.