- Companies
- Installers
- Watford
- SD Boize & Co Ltd
SD Boize & Co Ltd
- Company number
- 12038031
- Incorporated
- 7 Jun 20197 years trading
- Registered office
- 136 ST. Albans Road, Watford, WD24 4FT
- Nature of business
- Other construction installation
SD Boize & Co Ltd is a 7-year-old private limited company registered in Watford, company number 12038031, one of 80 installation companies (insulation, lifts, shutters and similar) in Watford. Its next accounts are due at Companies House on 31 March 2028, and the CT600 for the period to 30 June 2027 is due at HMRC on 30 June 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for SD Boize & Co LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £20K (-526.1%) on the year before, to -£24K.
- Net assets rose in 1 of 6 year-on-year comparisons on record.
- Current assets of £3,663 against £32K owed within a year: 0.1 times cover.
- 2 employees on average, down from 3 the year before.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2026 | -£24K | £3,663 | £32K | 2 | |
| 30 Jun 2025 | -£3,796 | £4,282 | £8,587 | 3 | |
| 30 Jun 2024 | -£18K | £5,599 | £8,191 | 2 | |
| 30 Jun 2023 | -£8,802 | £21K | £11K | 2 | |
| 30 Jun 2022 | -£5,374 | £28K | £28K | £15K | 2 |
| 30 Jun 2021 | £1,186 | £37K | £38K | £23K | 3 |
| 30 Jun 2020 | £4,166 | £30K | £30K | £36K | 2 |
Where SD Boize & Co Ltd is registered
The registered office is in Watford (WD24), in the Watford local authority area, East of England. Show WD24 4FT on a map.
Other trade companies in WD24
- VK28 Services LtdFinishing trades
- DRR Builders LtdBuilders
- Redmarsh Trade LimitedMotor traders
- Herts Trading LtdMotor traders
- Coversure Roofing & Building LtdRoofers
- LLS Building LimitedBuilders
- Snagsense LtdSpecialist contractors
- D&X Cleaning Solutions LtdCleaning companies
Shared registered office
29 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if SD Boize & Co 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 March 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2028 to 30 Apr 2028 | £150 |
| 1 to 3 months late | 1 May 2028 to 30 Jun 2028 | £375 |
| 3 to 6 months late | 1 Jul 2028 to 30 Sep 2028 | £750 |
| More than 6 months late | From 1 Oct 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2028 | £200 |
| 3 months late | 30 Sep 2028 | another £200 |
| 6 months late | 30 Dec 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 2029 | 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
- 12038031
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 June 2019 (7 years ago)
- Registered office
- 136 ST. Albans Road, Watford, WD24 4FT
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2026
- Last confirmation statement
- 6 June 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Watford
Other active installation companies (insulation, lifts, shutters and similar) registered in Watford.
- Servicefill Limited2014
- Sol Glass Ltd2024
- Sol Tiling Ltd2021
- Speedy Garage Doors Ltd2020
- Spinetail Ltd2022
- Timberfusion Limited2009
- TM Contracts Ltd2013
- Tompkins Bros Ltd2021
All installation companies (insulation, lifts, shutters and similar) in Watford · All trades in Watford · Installers across the UK
Frequently asked questions
When are SD Boize & Co Ltd's accounts due?
SD Boize & Co Ltd's next accounts are due at Companies House by 31 March 2028 (in 535 days), covering the period to 30 June 2027.
When is SD Boize & Co Ltd's CT600 due?
The CT600 for the period to 30 June 2027 is due at HMRC by 30 June 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2028.
Is SD Boize & Co Ltd still trading?
SD Boize & Co 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 SD Boize & Co Ltd do?
SD Boize & Co Ltd is registered under Other construction installation (SIC 43290).
How old is SD Boize & Co Ltd?
SD Boize & Co Ltd was incorporated on 7 June 2019, 7 years ago.
What is the penalty if SD Boize & Co 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 SD Boize & Co 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.