- Companies
- Civil engineering
- Maidenhead
- SD Projects Ltd
SD Projects Ltd
- Company number
- 03699018
- Incorporated
- 21 Jan 199927 years trading
- Registered office
- Bridge House, 2, Bridge Avenue, Maidenhead, SL6 1RR
- Nature of business
- Construction of other civil engineering projects n.e.c.; Other professional, scientific and technical activities n.e.c.
SD Projects Ltd is a 27-year-old private limited company registered in Maidenhead, company number 03699018, one of 16 civil engineering contractors in Maidenhead. 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.
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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 £7,295 (-10.1%) on the year before, to £65K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £81K against £16K owed within a year: 4.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2026 | £65K | £81K | £81K | £16K | 2 |
| 31 Mar 2025 | £72K | £74K | £93K | £21K | 2 |
| 31 Mar 2024 | £69K | £63K | £89K | £20K | 0 |
| 31 Mar 2023 | £48K | £59K | £87K | £39K | 3 |
| 31 Mar 2022 | £44K | £60K | £84K | £41K | 2 |
| 31 Mar 2021 | £44K | £57K | £72K | £28K | 2 |
| 31 Mar 2020 | £45K | £39K | £57K | £14K | 1 |
| 31 Mar 2019 | -£41K | -£66K | £18K | 4 | |
| 31 Mar 2018 | -£37K | -£141K | £97K | 5 | |
| 31 Mar 2017 | £41K | £104K | £189K | £153K | 6 |
Where SD Projects Ltd is registered
The registered office is in Maidenhead (SL6), in the Windsor and Maidenhead local authority area, South East. Show SL6 1RR on a map.
Other trade companies in SL6
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- CC Garden Builds LtdBuilders
- Austin Groundwork Surfaces LimitedGroundworks and demolition
- Woodnest Interiors LtdJoiners and carpenters
- Carizmatic Company LimitedMotor traders
- Sakura Electrical LtdElectricians
- Elite Autos & Tyres LtdMotor traders
- Bigfrith End LtdSpecialist contractors
Also registered at this address
10 other companies use the same registered office as SD Projects Ltd.
- Britten Tyres LimitedMechanics and garages
- Compagnie Francaise D'electricite Et De Maintenance LtdElectricians
- Cost Component Consulting LtdProperty developers
- D.P. Slatter LtdElectricians
- Daniel & Company (Southern) LimitedProperty developers
- Deverell LimitedSpecialist contractors
- Levive Services LtdMechanics and garages
- Nortech Precision Engineering LimitedCivil engineering
- Pearce Autos LimitedMechanics and garages
- STR Building Services LtdBuilders
What happens if SD Projects 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
- 03699018
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 January 1999 (27 years ago)
- Registered office
- Bridge House, 2, Bridge Avenue, Maidenhead, SL6 1RR
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2026
- Last confirmation statement
- 21 January 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Maidenhead
Other active civil engineering contractors registered in Maidenhead.
- Sharp Rail Engineering Services Ltd2014
- Townend Developments Limited1993
- Utility Network Infrastructures Ltd2024
- Vector Structures Limited2018
- Ac Spires Engineering Limited2022
- Amack (Builders) Limited2018
- Berkley Precision Engineering Ltd2005
- Ca Consult Limited2005
All civil engineering contractors in Maidenhead · All trades in Maidenhead · Civil engineering across the UK
Frequently asked questions
When are SD Projects Ltd's accounts due?
SD Projects 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 Projects 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 Projects Ltd still trading?
SD Projects 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 Projects Ltd do?
SD Projects Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is SD Projects Ltd?
SD Projects Ltd was incorporated on 21 January 1999, 27 years ago.
What is the penalty if SD Projects 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 Projects 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.