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Public Sector Website Tender in London: Budget, Procurement Rules and Bid Documents

Mohamed Bah·Fondateur, Kolonell
October 6, 2026
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Public Sector Website Tender in London: Budget, Procurement Rules and Bid Documents

Public Sector Website Tender in London: Budget, Procurement Rules and Bid Documents

Websites

The verdict in three sentences

For a district council of around 110,000 residents in the London area, a website rebuild costs £30,000 to £70,000 ex VAT in 2026 for 200 to 400 pages, online services, an events calendar and WCAG 2.2 AA compliance backed by an audit. At that value, the contract sits below the Procurement Act 2023 threshold for sub-central authorities (around £215,000 including VAT, check the current figure), but a below-threshold notice on Find a Tender is required once the estimated value exceeds £30,000 including VAT if you advertise. The quality of the tender pack makes the difference: weighted criteria, a needs-based specification and a usable price schedule protect the council from unsuitable bids and challenges.

Realistic budget and scope for a council website

The budget depends less on page count than on public service features: online forms, a facilities directory, a calendar shared with parishes, mapping and accessibility. The table below gives 2026 orders of magnitude seen in tenders from councils of 60,000 to 200,000 residents.

ItemScope2026 range
Discovery and designInformation architecture, user journeys, prototypes, testing£5,000 to £11,000 ex VAT
CMS build200 to 400 pages, templates, multi-editor back office£11,000 to £26,000 ex VAT
Online servicesForms, appointment booking, report-it tools£3,500 to £11,000 ex VAT
Calendar and directoryEvents, facilities, community groups£2,500 to £6,000 ex VAT
MappingRecycling centres, schools, roadworks£2,000 to £5,000 ex VAT
AccessibilityAccessible design + WCAG 2.2 AA audit£3,000 to £6,500 ex VAT
Content migration and trainingMigration, training for 15 to 30 editors£2,000 to £4,500 ex VAT
Total build£30,000 to £70,000 ex VAT

Add hosting (£1,500 to £4,000 a year) and ongoing support, often 15 to 20% of the build cost per year. Over a 3-year contract, the value you estimate must include build, support and hosting: a £48,000 build with £9,000 of annual support and £2,500 of hosting comes to £82,500 ex VAT, still well below the threshold.

Tender documents and scoring criteria

A clear tender pack reduces clarification questions and, above all, legal risk. Each document has a specific job.

DocumentPurposeWatch point
Invitation to tenderProcess, timetable, criteria and weighted sub-criteriaPublish every sub-criterion and its weight
Terms and conditionsTerm, pricing, service credits, acceptance, IPSecure IP assignment and exit provisions
SpecificationFunctional, technical, accessibility, hosting needsState needs, not a named CMS
Pricing scheduleFixed prices and day ratesUsable lines for support and change requests
Form of tenderBidder commitment on priceTotal value over the contract term
Quality response templateStructured bidder answersWord limits so bids can be compared

A common weighting is quality 60% (methodology 20%, design and references 20%, accessibility and performance 10%, support and exit 10%) and price 40%. Allow 21 to 30 days for responses: under 15 days sharply reduces the number and quality of bids. Councils can also call off from a framework such as Crown Commercial Service digital agreements, which shortens timelines to 4 to 8 weeks.

Mistakes that get a procurement set aside

Below-threshold contracts are lighter, but the duty to treat suppliers fairly and transparently still applies, and a challenged award costs months. The five most frequent mistakes on website tenders:

MistakeConsequenceFix
Undisclosed sub-criteria or weightingsSuccessful challenge, award set asideList and weight every sub-criterion
Naming a CMS without accepting equivalentsRestriction of competitionDescribe the functions required
Abnormally low bid not investigatedChallenge by a losing bidderRequest written justification
Underestimated contract valueWrong procedure, bids over budgetInclude support and hosting over 3 years
Accessibility missing from the specificationNon-compliant site, legal duty unmetRequire an audit and an accessibility statement

The Public Sector Bodies Accessibility Regulations 2018 require an accessibility statement and compliance with WCAG, and the Government Digital Service monitors council sites and can publish findings of non-compliance.

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Mini case study

Tom, head of communications at a district council of 110,000 residents near London, is planning a rebuild of a 260-page site. He estimates the build at £45,000 ex VAT, support at £8,500 a year and hosting at £2,500 a year. Over 3 years: £45,000 + 3 × (£8,500 + £2,500) = £78,000 ex VAT. He runs an open below-threshold tender advertised on Find a Tender, with 25 days to respond and 60/40 scoring. He receives 8 bids between £39,000 and £66,000 for the build. The winner, scored 86/100, delivers in 5 months with a first audit at 84% of WCAG criteria met, reaching 97% after fixes.

FAQ

Which route suits a council website worth £50,000?

A below-threshold open or quotation-based process is enough, since the total stays well under the Procurement Act threshold. Calculate the value over the whole term, support and hosting included, and follow your contract standing orders.

Can we specify WordPress or Drupal?

Naming a product should be justified and accept equivalents. It is safer to describe needs: multiple editors, approval workflow, content export in an open format.

How long from publication to go-live?

Allow 1 to 2 months for tendering and evaluation, then 4 to 6 months for delivery. A project advertised in January is usually live between June and September.

Do we need an independent accessibility audit?

It is strongly recommended: an external audit costs £2,500 to £5,000 and underpins your accessibility statement. Set a target in the specification, for example 85% of criteria met at launch and 95% within 6 months.

What should the pricing schedule include for support?

A fixed annual fee (updates, security, backups) and day rates for changes, typically £550 to £800 a day in 2026. This lets you order enhancements without a new procurement.

Let's scope your project. We help you estimate the contract value, draft a needs-based specification and prepare an accessible build of £30,000 to £70,000 delivered in 4 to 6 months. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.

Tags:#website tender#public procurement#council website#Procurement Act#WCAG#tender documents
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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.