Fixed fee, before you commit
A Feasibility Study answers thequestion everything else assumes
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.
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?
Sometimes the most valuable answer is the advice not to proceed.
Watch
What proper preparation looks like on site
Where it fits
A range, a decision, then a contract.
Each stage answers a different question. You decide whether to continue at every point.
Free and instant
01Project Calculator
An indicative budget range and headline timeline in minutes.
A range
Fixed fee
02Feasibility Study
Your site, planning position, cost, programme and risks investigated in detail.
A decision
If you choose to proceed
03Pre-Construction Service Agreement
Detailed design, final specification, firm pricing and the construction programme.
A contract
Delivery
04Construction 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 is produced by the people who would actually build your project, not a third party estimator. That is 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
- § 1.0Project brief and objectivesWhat you want to achieve, captured precisely.
- § 2.0Measured surveyYour property, accurately recorded.
- § 3.0Planning drawingsDrawn to a standard ready to apply, with minor adjustments.
- § 4.0Planning appraisalBy our in-house planners: what consent will realistically allow.
- § 5.0Elemental cost planCosts broken down by element, not one lump sum.
- § 6.0Specification overviewThe standard of finish the numbers are based on.
- § 7.0Time scheduleHow long it will take, stage by stage.
- § 8.0Risk registerWhat could move the cost, and by how much.
- § 9.0RecommendationOur honest professional verdict on viability.
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 and doors£ ●●,●●●
- Internal finishes£ ●●,●●●
- M&E services£ ●●,●●●
- External works£ ●●,●●●
- Contingency£ ●●,●●●
Sample
Time schedule
§ 7.0 · p.19- Demolition
- Groundworks
- Superstructure
- Roofing
- First fix
- Plastering
- Second fix
- Decorations
- External works
Sample
Recommendation
§ 9.0 · p.24Viability verdict
Proceed, with two specification adjustments to hold the budget ceiling.
- Ground conditionsimpact band ● to ●●
- Structural openingimpact band ● to ●●
- Glazing lead timeprogramme +● wks
- Party wall processprogramme +● wks
Sample
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 build contract value, depending on the project. The exact fee is always agreed before work begins.
Commissioning the survey, drawings, planning advice, cost plan and programme separately would typically cost £7,750 to £11,500 or more.
How the fee works
- The fee
- 0.5% to 1.5% of the anticipated build contract value
- Agreed upfront
- The exact fee is confirmed in writing before work begins
- If we build it
- The fee is credited in full against your build cost
- Either way
- The study is yours to keep and use as you wish
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.
Enquiry and call
We confirm whether the study is the right next step.
Site visit and brief
We record the property, priorities and budget parameters.
The study
We investigate the options and produce the report over four to six weeks.
Review meeting
We explain every finding and leave the decision with you.
Straight answers
Questions we are often asked
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.
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.