- Company number
- 10022293
- Incorporated
- 23 Feb 201610 years trading
- Registered office
- 23 Oreston Road, Plymouth, PL9 7JZ
- Nature of business
- Construction of commercial buildings
South Coast Mechanical Ltd is a 10-year-old private limited company registered in Plymouth, company number 10022293, one of 182 building contractors in Plymouth. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £3,026 (+12.5%) on the year before, to £27K.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £208K against £163K owed within a year: 1.3 times cover.
- 2 employees 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £27K | £196K | £208K | £163K | 2 |
| 29 Feb 2024 | £24K | £160K | £176K | £125K | 2 |
| 28 Feb 2023 | £16K | £58K | £113K | £54K | 2 |
| 28 Feb 2022 | £3,435 | £55K | £51K | 2 | |
| 28 Feb 2021 | £34K | £99K | £65K | 2 | |
| 29 Feb 2020 | £37K | £129K | £92K | 2 | |
| 28 Feb 2019 | £28K | £114K | £86K | ||
| 28 Feb 2018 | £16K | £88K | £72K | ||
| 28 Feb 2017 | £22K | £38K | £16K |
Where South Coast Mechanical Ltd is registered
The registered office is in Plymouth (PL9), in the Plymouth local authority area, South West. Show PL9 7JZ on a map.
Other trade companies in PL9
- CTP Trademark LtdMotor traders
- Evoclass LtdMotor traders
- R.M Marine Engineering LtdMachinery repair and installation
- Onee Property Cleaning LtdCleaning companies
- Redwire Technical LtdElectricians
- Trufit Carpentry LtdBuilders
- Ak Building & Construction Services LimitedSpecialist contractors
- J Cole Building Services LtdSpecialist contractors
What happens if South Coast Mechanical 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 10022293
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 February 2016 (10 years ago)
- Registered office
- 23 Oreston Road, Plymouth, PL9 7JZ
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 8 March 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 Plymouth
Other active building contractors registered in Plymouth.
- South Hams Mechanical Services Ltd2001
- Southern Bricklaying Services Ltd2021
- Southern Construction & Extensions Ltd2023
- SP Build & Design Ltd2025
- SRD Bricklaying Ltd2024
- SSD Building Services Limited2015
- STP Building and Maintenance Ltd2023
- Tavistock Building Solutions Limited2023
All building contractors in Plymouth · All trades in Plymouth · Builders across the UK
Frequently asked questions
When are South Coast Mechanical Ltd's accounts due?
South Coast Mechanical Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is South Coast Mechanical Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is South Coast Mechanical Ltd still trading?
South Coast Mechanical 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 South Coast Mechanical Ltd do?
South Coast Mechanical Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is South Coast Mechanical Ltd?
South Coast Mechanical Ltd was incorporated on 23 February 2016, 10 years ago.
What is the penalty if South Coast Mechanical 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 South Coast Mechanical 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.