- Companies
- Machinery repair and installation
- Hitchin
- SDL Construction Ltd
SDL Construction Ltd
- Company number
- 06171479
- Incorporated
- 20 Mar 200719 years trading
- Registered office
- 45 Valley Road, Codicote, Hitchin, Hertfordshire, SG4 8YW
- Nature of business
- Repair and maintenance of other transport equipment n.e.c.
SDL Construction Ltd is a 19-year-old private limited company registered in Hitchin, company number 06171479, one of 21 machinery repair and installation companies in Hitchin. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where SDL Construction Ltd is registered
The registered office is in Hitchin (SG4), in the North Hertfordshire local authority area, East of England. Show SG4 8YW on a map.
Other trade companies in SG4
- Pro Builders LtdLandscapers and gardeners
- Pwevents Group LtdElectricians
- Strata Washrooms LimitedInstallers
- Riseup Solar LtdSpecialist contractors
- Broadview Installations LtdGlaziers
- A2B Building Services LtdBuilders
- Loci Construction LtdSpecialist contractors
- Aurum Haven Maintenance Services LtdInstallers
Also registered at this address
6 other companies use the same registered office as SDL Construction Ltd.
- BMS Leak Detection LtdPlumbers and heating engineers
- CWF Refurbishments LimitedSpecialist contractors
- FPRS Plumbing and Drains LimitedPlumbers and heating engineers
- Holiday Cleaning Services LtdCleaning companies
- Island Decking LimitedLandscapers and gardeners
- Seaview Cleaning Services LtdCleaning companies
What happens if SDL Construction 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 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
- 06171479
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 March 2007 (19 years ago)
- Registered office
- 45 Valley Road, Codicote, Hitchin, Hertfordshire, SG4 8YW
- Nature of business
- Repair and maintenance of other transport equipment n.e.c. (SIC 33170)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 20 March 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Hitchin
Other active machinery repair and installation companies registered in Hitchin.
- Shanks Power Solutions Ltd2010
- Southern Commercial Truck & Trailer Repairs Ltd2012
- Ace of Herts Ltd2010
- Artavia Limited2016
- Aston Garden Machinery & Repairs Limited2024
- Cat-Aviation Limited2014
- Catech. CTS Limited2019
- CG Services (Hitchin) Ltd2024
All machinery repair and installation companies in Hitchin · All trades in Hitchin · Machinery repair and installation across the UK
Frequently asked questions
When are SDL Construction Ltd's accounts due?
SDL Construction Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is SDL Construction Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is SDL Construction Ltd still trading?
SDL Construction 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 SDL Construction Ltd do?
SDL Construction Ltd is registered under Repair and maintenance of other transport equipment n.e.c. (SIC 33170).
How old is SDL Construction Ltd?
SDL Construction Ltd was incorporated on 20 March 2007, 19 years ago.
What is the penalty if SDL Construction 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 SDL Construction 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.