- Companies
- Plumbers and heating engineers
- Basildon
- South West London Design&Build Limited
South West London Design&Build Limited
- Company number
- 10137623
- Incorporated
- 21 Apr 201610 years trading
- Registered office
- 43 Mistley Path, Basildon, SS16 4AW
- Nature of business
- Plumbing, heat and air-conditioning installation
South West London Design&Build Limited is a 10-year-old private limited company registered in Basildon, company number 10137623, one of 140 plumbing and heating companies in Basildon. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 down £2,357 (-100%) on the year before, to £1.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £347 against £346 owed within a year: 1.0 times cover.
- 1 employee on average, down from 2 the year before.
- 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 |
|---|---|---|---|---|---|
| 30 Apr 2025 | £1 | £347 | £346 | 1 | |
| 30 Apr 2024 | £2,358 | £100K | £552 | 2 | |
| 30 Apr 2023 | £38K | £275K | £122K | 2 | |
| 30 Apr 2022 | £1 | £1 | £0 | 2 | |
| 30 Apr 2021 | £21K | £72K | £5,690 | 2 | |
| 30 Apr 2020 | £13K | £11K | £3,601 | 2 | |
| 30 Apr 2019 | £34K | £116K | £30K | ||
| 30 Apr 2018 | £31K | £83K | £41K | ||
| 30 Apr 2017 | £9,823 | £15K | £27K | £5,892 |
Where South West London Design&Build Limited is registered
The registered office is in Basildon (SS16), in the Basildon local authority area, East of England. Show SS16 4AW on a map.
Other trade companies in SS16
- Kga Commercial LimitedSpecialist contractors
- Banenas Construction LtdBuilders
- Volcov Constructions LtdBuilders
- Pearly Plasterer LtdBuilders
- Valkvay LtdJoiners and carpenters
- Aska Construction LtdBuilders
- PMG Flooring LtdFloor and wall tilers
- VHN IT LtdElectricians
What happens if South West London Design&Build Limited 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 10137623
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 April 2016 (10 years ago)
- Registered office
- 43 Mistley Path, Basildon, SS16 4AW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 6 February 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Basildon
Other active plumbing and heating companies registered in Basildon.
- Southern Commercial Heating Ltd2019
- SS City Plumbing Limited2014
- Supreme Se Ltd2025
- Taps & Traps Limited2026
- Task Heating Soloutions Ltd2026
- Taylormade Group Holdings Limited2018
- Taylormade Mechanical & Electrical Services Limited2009
- Thames Energy Limited1988
All plumbing and heating companies in Basildon · All trades in Basildon · Plumbers and heating engineers across the UK
Frequently asked questions
When are South West London Design&Build Limited's accounts due?
South West London Design&Build Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is South West London Design&Build Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is South West London Design&Build Limited still trading?
South West London Design&Build Limited 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 West London Design&Build Limited do?
South West London Design&Build Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is South West London Design&Build Limited?
South West London Design&Build Limited was incorporated on 21 April 2016, 10 years ago.
What is the penalty if South West London Design&Build Limited 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 West London Design&Build Limited 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.