The Mosaic Feasibility Study · Fixed fee

Know exactly what your project will cost before you commit to building it.

Extending or rebuilding a home is one of the largest financial decisions most families ever make. The Feasibility Study is a fixed-fee investigation of your project: cost, specification, programme and risk: so you make that decision on evidence, not estimates.

Fixed fee, agreed before we start. Credited in full if you build with us. No obligation either way.

Elemental cost plan § 5.0
Mosaic Bespoke · St Albans
Feasibility
Study
FS-001 · Rev ACost · Programme · Risk
Why it exists

Most building projects do not fail on site. They fail on paper, months earlier.

Designed over budget

Drawings are produced before anyone has properly priced them. The tender then arrives far above budget and months are lost redesigning.

Priced on guesswork

A quick estimate is not a cost plan. Projects that begin with a guess often end with variations and a final bill nobody expected.

Committed too early

Design fees, planning and property decisions can all come before the central question has been answered: does the project actually work?

What it is

A fixed fee investigation of your cost, specification, programme and risk, ending with a written recommendation to proceed, adjust or stop. You keep the report whatever you decide.

Sometimes the most valuable answer is the advice not to proceed.
Where it fits

A range, a decision, then a contract.

Each stage answers a different question. You decide whether to continue at every point.

01
Free and instant

Project Calculator

An indicative budget range and headline timeline in minutes.

A range
02
Fixed fee

Feasibility Study

Your site, planning position, cost, programme and risks investigated in detail.

A decision
03
If you choose to proceed

Pre Construction Service Agreement

Detailed design, final specification, firm pricing and the construction programme.

A contract
04
Delivery

Construction and Handover

Your build is managed from the first day on site through to final checks, aftercare and the keys.

Your home
What you receive

A document you can build on. Literally.

The Feasibility Study is delivered as a single written report. Every section exists to answer one client question: can we do this, what will it cost, how long will it take, and what could go wrong?

It's produced by the people who would actually build your project, not a third party estimator. That's why the numbers hold up when construction starts.

If you go on to build with Mosaic, the study becomes the foundation of your contract documents: nothing is thrown away or repeated.

Feasibility Study MOSAIC · FS-001 · REV A
Project brief & objectivesWhat you want to achieve, captured precisely
§ 1.0
Measured surveyYour property, accurately recorded
§ 2.0
Planning drawingsDrawn to a standard ready to apply, with minor adjustments
§ 3.0
Planning appraisalBy our experienced in-house planners: what consent will realistically allow
§ 4.0
Elemental cost planCosts broken down by element: not one lump sum
§ 5.0
Specification overviewThe standard of finish the numbers are based on
§ 6.0
Time scheduleHow long it will take, stage by stage
§ 7.0
Risk registerWhat could move the cost, and by how much
§ 8.0
RecommendationOur honest professional verdict on viability
§ 9.0
Fixed fee: typically 0.5%–1.5% of contract value: always agreed before we startTurnaround: 4–6 weeks from site visit
Inside the document

See the level of detail you receive

These illustrative pages show the cost plan, time schedule and written recommendation. Your own study is produced for your project alone.

Elemental cost plan§ 5.0 · p.14
Substructure
£ ●●,●●●
Superstructure
£ ●●●,●●●
Roof
£ ●●,●●●
Windows & doors
£ ●●,●●●
Internal finishes
£ ●●,●●●
M&E services
£ ●●,●●●
External works
£ ●●,●●●
Contingency
£ ●●,●●●
MOSAIC BESPOKE · FEASIBILITY STUDYSAMPLE
Time schedule§ 7.0 · p.19
Demolition
Groundworks
Superstructure
Roofing
1st fix
Plastering
2nd fix
Decorations
External works
MOSAIC BESPOKE · FEASIBILITY STUDYSAMPLE
Recommendation§ 9.0 · p.24
Viability verdict
Proceed: with two specification adjustments to hold the budget ceiling.
Ground conditionsimpact band ●–●●
Structural openingimpact band ●–●●
Glazing lead timeprogramme +● wks
Party wall processprogramme +● wks
MOSAIC BESPOKE · FEASIBILITY STUDYSAMPLE
What it costs

A small investment before a much larger commitment.

The fixed fee is normally between 0.5% and 1.5% of the anticipated contract value, depending on the project. The exact amount is agreed before we begin.

Commissioning the survey, drawings, planning advice, cost plan and programme separately would typically cost £7,750 to £11,500 or more.

Example project

Anticipated project value

£250,000

Approximate study fee

£2,500

Credited if Mosaic builds

− £2,500

Net study cost if you build with us

Nil
Is it right for you?

For people making a serious property decision.

  • A significant extension, renovation or new build
  • A property purchase you need to assess before exchange
  • Existing drawings that need an honest budget check
  • A need for evidence before committing further money
It is not designed for small repairs, free estimates or collecting quick quotes on price alone.
How it works

From conversation to a clear answer.

  1. 01

    Enquiry and call

    We confirm whether the study is the right next step.

  2. 02

    Site visit and brief

    We record the property, priorities and budget parameters.

  3. 03

    The study

    We investigate the options and produce the report over 4 to 6 weeks.

  4. 04

    Review meeting

    We explain every finding and leave the decision with you.

Straight answers

Questions we are often asked

Is this the same as getting a quote?
No. A quote prices something that has already been fully defined. A Feasibility Study comes earlier. It tests whether the project is viable and defines the information needed to make a later price reliable.
Do we have to build with Mosaic afterwards?
No. The report is yours to keep and use however you choose. If you do build with Mosaic, the full study fee is credited against the project.
We already have architectural drawings. Is it still useful?
Often it is most useful at exactly that point. Drawings show what the project looks like. The study tests what it costs, how long it takes and where the risks sit.
What if the study says the project does not work?
Then it has done its job. The recommendation will explain what needs to change in the scope, specification or budget, giving you a practical route forward or the confidence to stop.
Where do you work?
Mosaic is based in St Albans and works across Hertfordshire and the surrounding areas, including parts of Essex for suitable projects.
Next step

Start with a conversation.

Tell us about the project and we will help you decide whether the calculator, a Feasibility Study or another route is the right place to begin.

Book a Feasibility Study Use the Project Calculator WhatsApp Kevin on +44 7537 134001