- Companies
- Specialist contractors
- Seaham
- SLD Planning Ltd
SLD Planning Ltd
- Company number
- 10086873
- Incorporated
- 29 Mar 201610 years trading
- Registered office
- Twynholme Overdene, Dalton-Le-Dale, Seaham, SR7 8QZ
- Nature of business
- Other specialised construction activities n.e.c.
SLD Planning Ltd is a 10-year-old private limited company registered in Seaham, company number 10086873, one of 11 specialist construction companies in Seaham. 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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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 up £1,505 (+477.8%) on the year before, to £1,820.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £41K against £27K owed within a year: 1.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £1,820 | £1,942 | £41K | £27K | 1 |
| 31 Mar 2024 | £315 | £15K | £45K | £27K | 1 |
| 31 Mar 2023 | £2,154 | £38K | £53K | £30K | 1 |
| 31 Mar 2022 | £3,499 | £8,449 | £47K | £19K | 1 |
| 31 Mar 2021 | £14K | £61K | £68K | £26K | 1 |
| 31 Mar 2020 | £10K | £25K | £38K | £28K | 1 |
| 31 Mar 2019 | £2,627 | £3,566 | £17K | £14K | 1 |
| 31 Mar 2018 | -£3,612 | £11 | £671 | £4,283 | 1 |
| 31 Mar 2017 | -£2,373 | £695 | £5,350 | £8,709 | 1 |
Where SLD Planning Ltd is registered
The registered office is in Seaham (SR7), in the County Durham local authority area, North East. Show SR7 8QZ on a map.
Other trade companies in SR7
- Northeast Hygiene Solution LtdCleaning companies
- Wraccess LimitedElectricians
- GS Groundworks Ne LtdCivil engineering
- Alloy Wheel Studio LimitedMechanics and garages
- Leewoods Developments LtdProperty developers
- Parker Clarke Group LtdMachinery repair and installation
- Coast 2 Coast Builders LtdBuilders
- Technalight LtdElectricians
What happens if SLD Planning 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
- 10086873
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 March 2016 (10 years ago)
- Registered office
- Twynholme Overdene, Dalton-Le-Dale, Seaham, SR7 8QZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 8 April 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Seaham
Other active specialist construction companies registered in Seaham.
- ST. Astier Limited2003
- Subport (Durham) Limited2024
- Tempest Rope Access Solutions Limited2023
- Buffalo Power Services Limited2003
- Drilcorp Limited1992
- Eleganz Constructions Limited2016
- L.Brunning Inspection Services Ltd2022
- Odin Construction Services Ltd2025
All specialist construction companies in Seaham · All trades in Seaham · Specialist contractors across the UK
Frequently asked questions
When are SLD Planning Ltd's accounts due?
SLD Planning 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 SLD Planning 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 SLD Planning Ltd still trading?
SLD Planning 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 SLD Planning Ltd do?
SLD Planning Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is SLD Planning Ltd?
SLD Planning Ltd was incorporated on 29 March 2016, 10 years ago.
What is the penalty if SLD Planning 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 SLD Planning 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.