- Companies
- Civil engineering
- Cambridge
- Extrabuild Limited
Extrabuild Limited
- Company number
- 10180463
- Incorporated
- 16 May 201610 years trading
- Registered office
- Tennyson House Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ
- Nature of business
- Construction of other civil engineering projects n.e.c.
Extrabuild Limited is a 10-year-old private limited company registered in Cambridge, company number 10180463, one of 52 civil engineering contractors in Cambridge. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 30 May 2026 is due at HMRC on 30 May 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 £100K (-4.6%) on the year before, to £2.1M.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £2.3M against £559K owed within a year: 4.1 times cover.
- 13 employees on average, up from 0 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 |
|---|---|---|---|---|---|
| 31 May 2025 | £2.1M | £1M | £2.3M | £559K | 13 |
| 31 May 2024 | £2.2M | £1.4M | £2.4M | £697K | 0 |
| 31 May 2023 | £2M | £902K | £1.8M | £486K | 0 |
| 31 May 2022 | £1.1M | £47K | £1.2M | £232K | 10 |
| 31 May 2021 | £374K | £316K | £506K | £171K | 1 |
| 31 May 2020 | £268K | £417K | £166K | 2 | |
| 31 May 2019 | £104K | £139K | £51K | ||
| 31 May 2018 | £53K | £72K | £106K | £55K | |
| 31 May 2017 | £1 |
Who runs and owns Extrabuild Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| T*** K*** | Director | Feb 2018 |
| R*** J*** | Director | Feb 2023 |
2 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| P*** R*** | Director | May 2016 | Jun 2018 |
| D*** W*** | Director | Feb 2023 | Mar 2025 |
Person with significant control
Where Extrabuild Limited is registered
The registered office is in Cambridge (CB4), in the Cambridge local authority area, East of England. Show CB4 0WZ on a map.
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Also registered at this address
8 other companies use the same registered office as Extrabuild Limited.
- Amberframe LimitedProperty developers
- Debondt LimitedSpecialist contractors
- Jer Construction LimitedBuilders
- NNC LtdBuilders
- Park Revolution Leisure LtdProperty developers
- Richard Hough (Building) LimitedFinishing trades
- S & P Mainlayers LimitedCivil engineering
- The Jolly Minster Development Company LimitedProperty developers
What happens if Extrabuild 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 May 2027 | £200 |
| 3 months late | 30 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 May 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
- 10180463
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 May 2016 (10 years ago)
- Registered office
- Tennyson House Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 6 July 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 Cambridge
Other active civil engineering contractors registered in Cambridge.
- Fan Engeneering Limited2023
- Fenmac Limited1999
- Ferrotek Ltd2018
- Galvanize Engineering Ltd2022
- Gaskin Brothers Limited2008
- Ground Utilities Ltd2015
- Hec Group Ltd2022
- Incatuk & Mbsu Ltd2026
All civil engineering contractors in Cambridge · All trades in Cambridge · Civil engineering across the UK
Frequently asked questions
When are Extrabuild Limited's accounts due?
Extrabuild Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 30 May 2026.
When is Extrabuild Limited's CT600 due?
The CT600 for the period to 30 May 2026 is due at HMRC by 30 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Extrabuild Limited still trading?
Extrabuild 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 Extrabuild Limited do?
Extrabuild Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Extrabuild Limited?
Extrabuild Limited was incorporated on 16 May 2016, 10 years ago.
Who runs Extrabuild Limited?
Extrabuild Limited has 2 active directors, the longest-serving appointed in Feb 2018. Their names and service addresses are on the Companies House register.
Who owns Extrabuild Limited?
One person or company has significant control of Extrabuild Limited: Extrabuild Holding Company Limited (owns 75% or more of the shares).
What is the penalty if Extrabuild 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 Extrabuild 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.