- Companies
- Civil engineering
- Guildford
- Constant Structural Design Limited
Constant Structural Design Limited
- Company number
- 07661750
- Incorporated
- 8 Jun 201115 years trading
- Registered office
- 11 Grantley Close, Shalford, Guildford, GU4 8DL
- Nature of business
- Construction of other civil engineering projects n.e.c.; Other engineering activities
Constant Structural Design Limited is a 15-year-old private limited company registered in Guildford, company number 07661750, one of 23 civil engineering contractors in Guildford. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £85K (+12.1%) on the year before, to £782K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £895K against £177K owed within a year: 5.0 times cover.
- 6 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £782K | £728K | £895K | £177K | 6 |
| 30 Jun 2024 | £698K | £776K | £191K | 6 | |
| 30 Jun 2023 | £631K | £585K | £29K | 7 | |
| 30 Jun 2022 | £639K | £672K | £60K | 6 | |
| 30 Jun 2021 | £618K | £764K | £166K | 6 | |
| 30 Jun 2020 | £568K | £631K | £89K | 4 | |
| 30 Jun 2019 | £478K | £491K | £49K | ||
| 30 Jun 2018 | £750K | £779K | £66K | ||
| 30 Jun 2017 | £639K | £646K | £51K | ||
| 30 Jun 2016 | £496K | £564K | £74K |
Where Constant Structural Design Limited is registered
The registered office is in Guildford (GU4), in the Guildford local authority area, South East. Show GU4 8DL on a map.
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What happens if Constant Structural Design 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 07661750
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 June 2011 (15 years ago)
- Registered office
- 11 Grantley Close, Shalford, Guildford, GU4 8DL
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Other engineering activities (SIC 71129) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 7 November 2025
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 Guildford
Other active civil engineering contractors registered in Guildford.
- D H Building Services Limited2002
- Drainageve Ltd2020
- Dutch Limited2013
- G and Martins Limited2018
- Hedef Structural Engineering and Consulting Ltd2021
- J & G Traffic Ltd2015
- Jaws Resources Limited2015
- M2 Project Engineering Ltd.2022
All civil engineering contractors in Guildford · All trades in Guildford · Civil engineering across the UK
Frequently asked questions
When are Constant Structural Design Limited's accounts due?
Constant Structural Design Limited's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Constant Structural Design Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Constant Structural Design Limited still trading?
Constant Structural Design 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 Constant Structural Design Limited do?
Constant Structural Design Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Other engineering activities (SIC 71129).
How old is Constant Structural Design Limited?
Constant Structural Design Limited was incorporated on 8 June 2011, 15 years ago.
What is the penalty if Constant Structural Design 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 Constant Structural Design 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.