Engineering and environmental consultancies to acquire in Southampton
Updated 12 November 2026
Looking to acquire an engineering or environmental consultancy in Southampton? Firmbase ranks 12 engineering and environmental consultancies using public company information to help buyers prioritise firms for research and potential outreach. The Approach Score ranks firms using public signals including director age and tenure, ownership, business scale, financial strength and recent changes. These firms are not listed for sale, and the ranking does not indicate that an owner is considering a sale.
The median firm has 13 staff and has been in business for 15 years. Looking beyond Southampton? Explore the full South East list of engineering and environmental consultancies.
12
Firms
UK 624
10%
Every director 55+
UK 15%
8%
Held 75%+ by one person
UK 19%
15
Median years in business
UK 14
13
Median headcount
UK 11
£500k to £1m
Median turnover band
UK £500k to £1m · includes our estimates
All 12 firms, in Approach Score order
| Rank | Firm | Approach Score | The facts behind the score |
|---|---|---|---|
| 1 | Horizon Power and Energy Southampton, Hampshire | Approach Score 84/100 |
More about this firm
Company no. 08054141 · Companies House |
| 2 | Patterson Reeves & Partners Eastleigh, Hampshire | Approach Score 76/100 |
More about this firm
Company no. 04450543 · Companies House |
| 3 | White Structural Southampton, Hampshire | Approach Score 72/100 |
More about this firm
Company no. 07479194 · Companies House |
| 4 | Argo Engineering Solutions Southampton, Hampshire | Approach Score 64/100 |
More about this firm
Company no. 10368872 · Companies House |
| 5 | ATG Group Winchester, Hampshire A director sits on 4 or more companies | Approach Score 61/100 |
More about this firm
Company no. 07545238 · Companies House |
| 6 | DFL Winchester, Hampshire A director sits on 4 or more companies | Approach Score 59/100 |
More about this firm
Company no. 04081039 · Companies House |
| 7 | Ground Condition Consultants Southampton, Hampshire | Approach Score 58/100 |
More about this firm
Company no. 10960311 · Companies House |
| 8 | Marbas Winchester, Hampshire A director sits on 4 or more companies | Approach Score 54/100 |
More about this firm
Company no. 09613989 · Companies House |
| 9 | Chamberlains Aqua System Eastleigh, Hampshire | Approach Score 48/100 |
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Company no. 11098150 · Companies House |
| 10 | Collaborative Environmental Advisers (CEA) Southampton, Hampshire | Approach Score 47/100 |
More about this firm
Company no. 11114584 · Companies House |
| 11 | Technodyne Eastleigh, Hampshire | Approach Score 46/100 | We hold older figures than Companies House
More about this firm
Company no. 03396849 · Companies House |
| 12 | Arch Associates Bishops Waltham Southampton, Hampshire | Approach Score 38/100 |
More about this firm
Company no. 03832290 · Companies House |
Buy the list of all 12 firms, with director names, ages and shareholders
Each row comes with the facts behind its score, financials with dates and contact details.
What's in the file
One row per firm, in Approach Score order, as Excel + CSV.
It holds the facts behind each score, points for each part of the score, financials with dates, publicly available contact details, where identified, director names and named shareholders.
Some people with significant control appear as Other individual, with no further detail. Director email lookups are not included.
How this list is filtered
- 5 or more staff, from filed headcount or our estimate where none is filed.
- Registered office in Southampton.
How this list is built
The Approach Score ranks firms mainly on public Companies House information about owner tenure and age, ownership, size, financial strength and recent register changes.
Firms with higher scores appear first in each list.
Use the ranking to order research, then check each business directly.
What it does not mean
No firm here is for sale, and the score says nothing about any owner's plans.
At least 95% of the firms where we hold directors had them checked in or after November 2026.
What we do not cover
Regulatory information is not included in this list. Buyers should check the relevant register as part of their due diligence. There is no single regulator for these consultancies. Check claimed individual Engineering Council registration through RegCheck; professional registration does not certify the consultancy itself.
Why age bands but no people's names
Age bands come from the month and year of birth on Companies House. This page shows no exact ages and no people's names. Both come with the purchased list. The band edges from 45 to 65 are the ages where the score changes. A row shows no age bands when a director's surname is in the firm's name, its group's name or its website. Those directors' ages still count towards the score.
Is this your firm?
You can ask us to take it off every acquisition page, and out of every list we sell after that. Give us your name and work email, and we send you a link to confirm. If your email address is on the firm's own website domain, the firm comes off once you confirm. If it is not, a person reviews your request first. A list already sold stays with its buyer.
To have personal data erased, see our privacy policy.
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The standard Firmbase list
Buy the list of all 12 firms, with director names, ages and shareholders
Each row comes with the facts behind its score, financials with dates and contact details.