- Companies
- Civil engineering
- Dorchester
- Mac Building Contractors Limited
Mac Building Contractors Limited
- Company number
- 04304622
- Incorporated
- 15 Oct 200124 years trading
- Registered office
- 18 High West Street, Dorchester, Dorset, DT1 1UW
- Nature of business
- Construction of other civil engineering projects n.e.c.
Mac Building Contractors Limited is a 24-year-old private limited company registered in Dorchester, company number 04304622, one of 9 civil engineering contractors in Dorchester. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £1,608 (+0.5%) on the year before, to £295K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £332K against £134K owed within a year: 2.5 times cover.
- 6 employees on average, down from 7 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | £295K | £230K | £332K | £134K | 6 |
| 31 Dec 2024 | £293K | £181K | £319K | £105K | 7 |
| 31 Dec 2023 | £282K | £250K | £312K | £123K | 9 |
| 31 Dec 2022 | £276K | £149K | £286K | £62K | 12 |
| 31 Dec 2021 | £271K | £178K | £292K | £73K | 10 |
| 31 Dec 2020 | £309K | £149K | £293K | £53K | 12 |
| 31 Dec 2019 | £308K | £191K | £338K | £87K | 13 |
| 31 Dec 2018 | £282K | £127K | £290K | £80K | 12 |
| 31 Dec 2017 | £296K | £92K | £302K | £82K | 13 |
| 31 Dec 2016 | £317K | £275K | £369K | £131K | 13 |
Public contracts won
Mac Building Contractors Limited has 3 public sector contract awards on record; the ones with their own published value total £65K, from 2018 to 2020. Source: Contracts Finder and Find a Tender award notices. 1 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Charmouth Parish Council3 awards
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Charmouth Parish Council | Repointing and Repair Works, The Old Cement Factory, Lower Sea Lane | £22K | 28 Jan 2020 |
| Charmouth Parish Council | Re-pointing work, The Elms, St Andrews Drive, Charmouth | £15K | 17 Dec 2019 |
| Charmouth Parish Council | Damp repairs to Beach Cafe Shop, Charmouth Foreshore | £29K | 13 Dec 2018 |
Where Mac Building Contractors Limited is registered
The registered office is in Dorchester (DT1), in the Dorset local authority area, South West. Show DT1 1UW on a map.
Other trade companies in DT1
- Wareham MOT LimitedMechanics and garages
- Coastal Crest Dorset Cleaning Company LimitedCleaning companies
- Hybrid Superstructures LtdBuilders
- Solo Construction & Development LimitedBuilders
- Guardian Home Improvements LimitedFinishing trades
- Dorset Cars LtdMotor traders
- Rebecca Scaffolding LtdScaffolders
- Fox Roofing & Leadworks LtdRoofers
Shared registered office
66 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 Mac Building Contractors 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 04304622
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 October 2001 (24 years ago)
- Registered office
- 18 High West Street, Dorchester, Dorset, DT1 1UW
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 15 October 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 Dorchester
Other active civil engineering contractors registered in Dorchester.
- MCB Civil Engineering Limited2008
- Newhouse Farm Partnership Limited2012
- Ucam Solutions Ltd2022
- Woods Industrial Limited2022
- Acorn Builders (Dorset) Limited2002
- Bredon Construction & Haulage (Wareham) Limited1988
- Dorset Utilities & Groundworks Ltd2019
- Mabey's Surfacing Ltd2024
All civil engineering contractors in Dorchester · All trades in Dorchester · Civil engineering across the UK
Frequently asked questions
When are Mac Building Contractors Limited's accounts due?
Mac Building Contractors Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is Mac Building Contractors Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Mac Building Contractors Limited still trading?
Mac Building Contractors 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 Mac Building Contractors Limited do?
Mac Building Contractors Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Mac Building Contractors Limited?
Mac Building Contractors Limited was incorporated on 15 October 2001, 24 years ago.
Has Mac Building Contractors Limited won public sector contracts?
Yes. Mac Building Contractors Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £65K), most recently from Charmouth Parish Council.
What is the penalty if Mac Building Contractors 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 Mac Building Contractors 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.