01 — Project Preview
An indicative range to orient you.
A quick cost range — low, likely, high — with an assessment of how demanding your project is and the factors most likely to move your number.
Free
Sheet 01 / 06 — The Commitment
Renovating shouldn't feel like a gamble. Renii gives you a clear cost range and flags the risks that blow budgets — before you sign a contract or spend a penny on design.
Sheet 02 / 06 — Uncertainty, priced
Renovation isn't stressful because of tiles. It's stressful because of uncertainty.
Once you sign, the uncertainty becomes yours.
Sheet 03 / 06 — The Method
01 — Project Preview
A quick cost range — low, likely, high — with an assessment of how demanding your project is and the factors most likely to move your number.
Free
02 — Renovation Intelligence Report
A full cost breakdown showing where the money goes, what is assumed, what is excluded, and where costs are most likely to move. Plus planning context for your area: how similar applications have been decided, what conditions are commonly applied, and what site constraints to know before you instruct an architect.
From £149
03 — Tender Comparison
Builders submit through Renii. Every builder prices against the same brief. Prices that look high or low are called out, with the specific areas driving the difference. The right questions to ask each builder, drawn from the cost risks and scope gaps most common in projects like yours.
From £495
Sheet 04 / 06 — Early access
Early-access users get the Project Preview free at launch — an indicative range, an assessment of how demanding your project is, and the factors most likely to move your number.
Sheet 04.5 / 06 — For Architects
A homeowner who arrives at your first consultation with a Renovation Intelligence Report has already established cost reality, confirmed their planning position, and mapped specialist requirements.
Renii is not a cost consultancy. It is decision support for the pre-design phase — complementary to architectural services, not competitive with them.
What the report covers
"A client who already knows their budget is realistic and has confirmed their planning position makes the first design meeting more productive."
Residential Architect · London
Independent
No builder relationships, no commission. Renii earns no referral fee from any party.
Pre-design only
Renii operates before design begins. Not a replacement for architectural cost estimates.
From £149
Less than 0.15% of a typical project spend. Free Project Preview at launch.
Decision Matrix
| Without Renii | With Renii |
|---|---|
| Quotes use different assumptions | Every builder prices against the same scope, so you can compare line by line Commitment Pack |
| Exclusions discovered after signing | Gaps in scope identified before you sign anything |
| You rely on instinct to negotiate | The right questions prepared before you sit down with any builder |
| Planning risks surface mid-design | How similar projects nearby were decided, visible before you spend anything on design |
Sheet 05 / 06 — Pricing
A small fraction of your overall commitment, to protect the rest of it.
01 · Orientation
Free
02 · Clarity · Most popular
From £149 scales by complexity
03 · Commitment
From £495 £149 credited
Comparison
| Renii | Three quotes, no framework | Hire a Quantity Surveyor | Generic online estimate | |
|---|---|---|---|---|
| What it tells you | A structured cost range with the planning context and assumptions behind the number | Three prices — each priced to a different scope | A bespoke estimate from an independent professional, with full accountability for the figures | A rough £/m² figure with little project-specific context |
| When it's useful | Before you commit — while decisions are still open | After you've invested in plans and specifications | Typically engaged once design and scope are developed | Early curiosity — not a decision input |
| Cost | From free | Free — but expensive if wrong | £1,500–£3,000+ | Free |
| Independence | Independent, grounded in UK construction cost benchmarks and live planning records | Builder has an incentive to win the job | Independent expert | No project-specific grounding |
FAQ
No. A cost calculator gives you a single number based on square metres. Renii gives you a structured cost breakdown showing where the money goes, what is included, what is not, and where costs are most likely to move. Planning context for your area is included. The output is designed to help you make a decision, not give you a number to ignore.
The ranges are indicative, not a quote or a guarantee. They are built on UK construction cost data and professional construction cost frameworks. The value is not in the number itself but in understanding what drives it, what assumptions it rests on, and where costs are most likely to move. That is what makes the decision-making better.
That is expected, and useful. The Renii output gives you a structured baseline to compare against. If a builder is significantly lower, Renii helps you understand why: missing elements, excluded items, or different assumptions. If significantly higher, it helps you interrogate that too. The point is not to match the Renii number but to understand the difference.
No. Renii provides structured decision intelligence. It is not professional advice, a formal cost plan signed by a Quantity Surveyor, or a planning consultancy service. It is a decision support tool designed to improve the quality of information available to homeowners before they commit capital.
No. Renii has no commercial relationship with builders and takes no commission. It has no financial interest in which builder you choose or whether you proceed. That independence is core to the product.
Yes, and for higher-value projects we would encourage it. Renii is designed to give you the structured intelligence you need before you are ready to instruct a Quantity Surveyor. It helps you understand your project well enough to brief professionals effectively and challenge any figures you receive. For complex projects above £300,000, or those with significant planning risk, Renii and an independent Quantity Surveyor work well together.
Sheet 06 / 06 — The night before
Clarity first. Commitment second.
No payment required · UK only at launch