The verdict in three sentences
For a London construction group that wins work through frameworks and tenders, the best option in 2026 is a B2B agency with built environment experience, able to structure a project library that bid teams can reuse. A brand consultancy is worth it only for a group rebranding across several divisions, at 80,000 to 120,000 GBP. A packaged first version such as Kolonell Premium can go live in weeks while the full project library is built.
Provider types, ranked
Clients, framework operators and main contractors check your site before shortlisting you. They look for projects by sector, health and safety performance, your approach to CDM 2015 duties, accreditations such as Constructionline or ISO 45001, social value commitments and ESG or carbon reporting. Since the Procurement Act 2023 came into force, public buyers expect this information to be easy to verify.
| Rank | Provider type | Budget (2026 estimate) | Timeline | Best for |
|---|---|---|---|---|
| 1 | B2B agency with built environment experience | 35,000 to 75,000 GBP | 10 to 14 weeks | Groups of 200 to 2,000 staff, 40 to 120 projects |
| 2 | Packaged build (Kolonell Premium) | 1,200 to 2,300 EUR | 21 to 30 days | Credible first version before a tender |
| 3 | Brand consultancy | 80,000 to 120,000 GBP | 14 to 20 weeks | Group wide rebrand, several divisions |
| 4 | Senior freelancer | 25,000 to 40,000 GBP | 8 to 12 weeks | Mid sized contractor, limited content |
| 5 | IT consultancy | 60,000 to 110,000 GBP | 14 to 20 weeks | Site tied to a bid library or extranet |
The specialist agency wins because it understands what a bid manager needs: filterable case studies with value, client, sector, procurement route and outcomes.
Total cost and performance
A construction site lives on imagery, which is also its main performance risk. Site teams and clients often browse on phones, so set a mobile page weight target under 1.5 MB and lazy load galleries.
| Criterion | B2B agency | Brand consultancy | Kolonell Premium | IT consultancy |
|---|---|---|---|---|
| Monthly maintenance | 800 to 2,000 GBP | 2,500 to 5,000 GBP | 38 to 115 EUR | 2,000 to 4,500 GBP |
| 3 year total | 64,000 to 147,000 GBP | 170,000 to 300,000 GBP | about 2,600 to 6,400 EUR | 132,000 to 272,000 GBP |
| Project library capacity | 40 to 120 | 50 to 150 | 30 to 60 | 50 to 150 |
| Typical mobile page weight | 1.2 to 2 MB | 2 to 4 MB | under 1.5 MB | 1.5 to 3 MB |
| Portability | Good if code is handed over | Good, formal contract | Code and domain owned by client | Good, heavy documentation |
| Accessibility | WCAG 2.1 AA usually included | Included | Checklist included | Included |
The saving between a brand consultancy and a specialist agency often funds a full year of drone and progress photography across live sites.
What to check in pitch meetings
Ask for a live construction or infrastructure site they built and open it on a phone over 4G. Check that the project template captures client, value, sector, procurement route, duration and before and after photos. Ask how ESG and social value data will be updated each year without a developer.
Mini case study
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Illustrative example, not a real client: Rachel, head of communications for a 600 person contractor in South East England, has 70 documented projects. She compares a brand consultancy at 95,000 GBP and a specialist agency at 48,000 GBP. With a framework bid due in five weeks, she first launches a Kolonell Premium version at about 2,200 EUR in 28 days, then commissions the specialist agency for the full library. The 47,000 GBP saved against the consultancy pays for two years of project photography.
FAQ
What should a London construction group budget for a website?
Roughly 25,000 to 120,000 GBP depending on the provider type and project count. A packaged first version starts at 1,200 to 2,300 EUR.
How many projects should we show?
At least 30 well documented projects, and 80 to 120 for a multi sector group. Each should state client, value and procurement route.
Should we publish ESG and carbon data?
Yes, public and private clients increasingly score it in tenders. A dedicated ESG section adds 3 to 6 days of work.
Why target under 1.5 MB per mobile page?
Heavy galleries above 3 MB often take more than 6 seconds to load on site connections. Fast pages keep bid managers and clients reading.
How long does a launch take?
Between 8 and 20 weeks depending on provider, mostly for photo and data collection. A packaged build ships in 21 to 30 days.
Let's scope your project. Send us your project count, divisions and next tender deadline, and we will price a Premium build from 1,200 to 2,300 EUR delivered in 21 to 30 days. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
