- Companies
- Installers
- S.D. Installations Limited
S.D. Installations Limited
- Company number
- 02592216
- Incorporated
- 15 Mar 199135 years trading
- Registered office
- East Wing Goffs Oak House, Goffs Lane, Goffs Oak, Hertfordshire, EN7 5GE
- Nature of business
- Other construction installation
S.D. Installations Limited is a 35-year-old private limited company registered in Goffs Oak, company number 02592216, one of the UK's installation companies (insulation, lifts, shutters and similar). Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 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 £17K (+0.6%) on the year before, to £2.6M.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £1.4M against £302K owed within a year: 4.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Mar 2025 | £2.6M | £503K | £1.4M | £302K | 0 |
| 30 Mar 2024 | £2.6M | £569K | £1.2M | £172K | 2 |
| 30 Mar 2023 | £2.6M | £544K | £1.3M | £110K | 2 |
| 30 Mar 2022 | £2.8M | £615K | £1.5M | £173K | 2 |
| 30 Mar 2021 | £2.9M | £666K | £1.6M | £157K | 2 |
| 31 Mar 2016 | £3.2M | £261K | £577K | £339K | |
| 31 Mar 2015 | £2.6M | £467K | £592K | £240K |
Public contracts won
S.D. Installations Limited has one public sector contract award on record; the ones with their own published value total £27K (2026). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Notting Hill Genesis | Demolition | £27K | 11 Aug 2026 |
Where S.D. Installations Limited is registered
The registered office is in Goffs Oak (EN7), in the Broxbourne local authority area, East of England. Show EN7 5GE on a map.
Other trade companies in EN7
- Sparkle & Press LtdCleaning companies
- Sotira Maintenance LtdFinishing trades
- Sentry: Rapid Response LtdElectricians
- Tornado Group London LtdMotor traders
- Platinum Hive Decorating LimitedPlasterers
- Nexo Concept LtdProperty developers
- Outin Solutions LimitedFinishing trades
- Trulys Trees LimitedLandscapers and gardeners
Also registered at this address
7 other companies use the same registered office as S.D. Installations Limited.
- All in Electrics LimitedElectricians
- JRH Autos and Bodyshop LimitedMechanics and garages
- Lycium LimitedProperty developers
- Neville Place LtdProperty developers
- Pippin Developments LimitedProperty developers
- Rainbow Place LimitedProperty developers
- Sullivan Bros. (Construction) LimitedInstallers
What happens if S.D. Installations 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 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 | 31 Mar 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 | 30 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
- 02592216
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 March 1991 (35 years ago)
- Registered office
- East Wing Goffs Oak House, Goffs Lane, Goffs Oak, Hertfordshire, EN7 5GE
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 March 2025
- Last confirmation statement
- 18 December 2025
- Charges (mortgages)
- 4 outstanding of 9 registered
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
Other active installation companies (insulation, lifts, shutters and similar).
Frequently asked questions
When are S.D. Installations Limited's accounts due?
S.D. Installations Limited's next accounts are due at Companies House by 30 December 2026 (in 79 days), covering the period to 30 March 2026.
When is S.D. Installations Limited's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is S.D. Installations Limited still trading?
S.D. Installations 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 S.D. Installations Limited do?
S.D. Installations Limited is registered under Other construction installation (SIC 43290).
How old is S.D. Installations Limited?
S.D. Installations Limited was incorporated on 15 March 1991, 35 years ago.
Has S.D. Installations Limited won public sector contracts?
Yes. S.D. Installations Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £27K), most recently from Notting Hill Genesis.
What is the penalty if S.D. Installations 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 S.D. Installations 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.