Hampstead Architecture and Planning

Technical & Building Regulations

Technical Design & Tender Documentation in London

A well-prepared tender package helps you compare builders fairly and reduces surprises on site. We produce coordinated technical and tender information — drawings, schedules and an outline specification — for London residential projects.

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Practice leadership

Eyal Moran, Director and Lead Architect, is an ARB-registered architect, leading design judgement, planning strategy and technical coordination across client projects.

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The short answer

What is a technical design and tender package?

It is the coordinated set of information contractors price and build from — construction drawings, an outline specification and schedules of finishes, windows and doors — that defines one identical scope. Because every builder prices the same complete information, the returns are genuinely comparable and there are fewer assumptions, variations and disputes once work begins on site.

Where design becomes a price

Tendering is the stage where a design becomes a price. If contractors price from inconsistent or incomplete information, their quotes are not comparable and the cheapest number often hides the most assumptions. A coordinated tender package lets you compare builders on a like-for-like basis and gives the successful contractor clear information to build from, reducing variations and disputes.

Coordinated and specified

We develop the design into coordinated technical information, integrating structural and other consultant input so the package holds together, and set out an outline specification appropriate to the project so the quality you expect is priced from the start. We then issue it to a selected list of contractors, manage their queries during tender, and help you review the returns.

What a complete tender package contains

A tender package is more than a set of drawings. It brings together the construction drawings, a specification describing materials and standards of work, schedules of finishes, windows and doors, and a clear definition of the scope and any preliminaries — so every contractor is pricing the same defined project. The completeness is the point: where the information is vague, builders price their own assumptions, and the returns become impossible to compare. A well-assembled package is what turns tendering from a guessing game into a genuine comparison.

Choosing and inviting the right contractors

Who you invite matters as much as the package itself. We help you draw up a sensible tender list — contractors of the right size and experience for the project, ideally with references and a track record on comparable London homes — rather than simply gathering the cheapest names. Inviting a handful of genuinely suitable builders to price the same information produces realistic, comparable bids and a contractor who actually wants the work, which is worth far more than a long list chasing the lowest number.

Reviewing tenders beyond the headline number

The lowest figure is rarely the whole story. We help you read the returns properly — normalising the quotes onto a like-for-like basis, identifying exclusions, provisional sums and assumptions, and checking that the cheapest bid has not simply left things out that will reappear as expensive variations later. The aim is to choose the contractor offering the best value and the most realistic price for the defined scope, with a clear understanding of what each tender does and does not include.

What we produce

Typical deliverables

  • Coordinated technical drawing set
  • Outline specification
  • Tender drawing package and schedules
  • Contractor query handling during tender
  • Tender comparison support

London-specific

What to keep in mind

  • Prime projects often involve several consultants whose information must align
  • High specification needs clear material and finish information
  • Listed and conservation detailing must be captured for pricing

How the process works

From first call to completion

  1. Technical design

    We develop the design into coordinated information.

  2. Specification

    We set out an outline specification.

  3. Tender

    We issue the package and manage queries.

  4. Review

    We help you compare returns on a consistent basis.

Considering this for your property?

Tell us the address and a short description of the work. We will advise which drawings, approvals and consultant inputs your project is likely to need.

Avoiding pitfalls

Common risks & mistakes

  • Tendering from incomplete or inconsistent drawings
  • Omitting specification so quality is not priced
  • Failing to manage tender queries consistently

Frequently asked questions

Why do I need a tender package?

Planning drawings do not contain enough technical detail to price or build accurately. A tender package gives contractors consistent, detailed information so quotes are comparable and there are fewer variations.

Can you help me choose a builder?

We issue the package to a selected list, manage tender queries and help you compare returns on a consistent basis. The appointment is your decision and is contracted separately.

Does the package include a specification?

Yes. We provide an outline specification of key materials and standards so quality expectations are priced from the outset.

How does this reduce cost surprises?

Clear, coordinated information means fewer assumptions priced as risk and fewer variations during construction.

How much does a technical design and tender package cost?

Fees depend on the scope, the property and how much consultant coordination the package involves — a single extension differs from a whole-house project integrating structural, energy and other specialists. We work to fixed fees confirmed once the scope is clear, starting at a £395 route review that is credited if you proceed; the packages are set out on our packages page. Council charges and specialist consultant fees sit outside the design fee and are identified up front.

How long does it take to get a tender package out and prices back from builders?

The package and the tender are timed separately, and clients usually plan for only the second. Preparing the information is design work: how long it takes turns on how much technical detail already exists, how many consultants' drawings must be integrated into one consistent set, and how far the specification and schedules need to go for the quality you expect to be priced rather than assumed. We agree that programme once the scope is set. The tender period is the one stage with a published figure — a few weeks, allowing contractors to price and raise queries and you to review the returns and appoint. Then allow for what follows: good builders are often booked ahead, so the wait between appointing a contractor and starting on site belongs in the programme too.

Discuss your project

Tell us about the property, location and the work you are considering. We will advise which architectural drawings, approvals or consultant inputs are likely to be needed.

Areas

Technical Design & Tender Documentation across London

Follow the local area pages for property types, planning authority context and conservation considerations in each neighbourhood we serve.

Browse all 55 additional London areas

Published local service pages appear above. Where a service-specific page is not yet published, these links lead to the public neighbourhood hub rather than an unpublished or generic local-service page.

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