How it works

From your address to a grounded budget — in five steps.

DomiReno is a wizard, not a black-box calculator. Every question we ask lands somewhere in the final amount, and on this page you see exactly where. Five phases, each with a visual preview of what you'll see in the tool and an honest explanation of why we ask.

5 independent cost sources8 official grant bodiesRegional factor by postcodeMargin ±15–25 %

1Wizard step 1 · ~1 minute

Your address and (optional) documents

You type your address — we automatically detect the region (Flanders, Brussels, Wallonia) and the regional price factor from your postcode. Optionally, upload your energy certificate; our AI reads the current state and pre-fills it in steps 2-3 for you.

Why we ask this

The region determines which grants are included in your calculation and which energy-label renovation obligations apply to your property. The postcode determines the regional price uplift — large-city cores structurally charge a bit more for logistics and accessibility. No address, no honest calculation, which is why we start here.

Wizard preview

Property address

Street and number, municipality…

We automatically detect region and price factor.

Documents (optional)

Energy certificate

Photos

2Wizard steps 2-5 · ~1-2 minutes

Mapping your property

Dwelling type (house/apartment), number of facades, roof shape, construction period, surfaces per floor, any extension or top-up. If you uploaded an energy certificate in step 1, most fields are pre-filled — you check and adjust where needed.

Why we ask this

Renovation cost scales with surface and with the difficulty of your existing construction. A 1920 house requires different interventions than a 2005 apartment. That's why we don't work with a lump-sum total but build your budget from the actual geometry of your property.

Wizard preview

Dwelling type

House

Apartment

Number of facades

Construction period

1920-1945

Main building surface

120m²

3Wizard steps 6-15 · ~2-3 minutes

Your plans by category

From demolition, foundation and drainage to roof, insulation, windows, electrics, heating, bathroom, kitchen, finishing and outdoor — thirteen categories where you indicate each time what you want done, how much (m², items), and at what quality level. Not applicable? Uncheck it and the category drops.

Why we ask this

Other calculators give you a total and a precision of "+/- 30%". That isn't an estimate, that's a guess. By asking explicitly per category, we know exactly where your money goes — and you can see afterwards which category eats the largest share. Exactly the information you need to adjust choices before asking for quotes.

Wizard preview

What will you have done?

Roof and insulation

Windows and doors

Electrics

Bathroom

Per category, we then ask about surface and quality level.

4Wizard step 16 · ~30 seconds

Package and execution

Choose your execution strategy: all via a contractor, partly yourself (DIY), with or without an architect. Per category, you can also set a DIY toggle for parts where you roll up your sleeves.

Why we ask this

Own work reduces labour cost by a factor of 0.3-0.5; an architect adds 8-10% in fees. This choice changes the total substantially. More importantly: DIY items are not eligible for certain grants — we immediately show which grants you give up for which work, so you can weigh the trade-off honestly.

Wizard preview

Execution strategy

All via a contractor

Partly yourself (DIY)

With an architect

Tip: DIY items are not eligible for certain grants — we show that per category.

5Wizard step 17 (result) · Immediately

Your budget, clearly explained

Total budget with margin, grant estimate based on your region, energy-label impact Before/After and a per-category breakdown showing where the biggest items sit. Pro unlock (€29) gives access to detail items, grants per item and PDF export.

Why we ask this

A figure without justification is hot air. We explicitly show which sources are in the calculation, which regional uplift was applied, which grants you can expect and how your energy label might jump — all on one screen. No account required up to here; you can see the result before deciding to save or unlock Pro.

Wizard preview

Total (incl. VAT)

€124,500

Margin ±15–25 %

Grants

− €8,200

Energy label Before → After

D → A

Large-city core · +4% regional uplift

DomiReno vs quotes vs architect estimates

We don't replace a contractor or an architect — we provide the estimate you need before you turn to them. The table below is deliberately symmetric: where they're better, it says so.

What you get	DomiReno	Contractor quote	Architect estimate
First estimate in 5 minutes Getting quotes typically takes 2-4 weeks per contractor.
Transparent sources per unit price Quotes are commercial prices without justification of the components; architect estimates vary by office.
Postcode-based regional factor Contractors and architects know their market area; we formalise that via 3 clusters.
Grant estimate per region Some contractors/architects handle it, many delegate it to the client or a specialist service.
Energy-label Before/After impact per choice A PEB assessor can deliver this; in a standard architect estimate it's usually not included.
Legally binding price Only a contractor's quote fixes a price. DomiReno is by definition an estimate, not a contract.
Plans, permits, PEB declaration
Site supervision + handover Contractors follow their own work; an architect coordinates across contractors.
Cost of the service DomiReno is free up to the total, €29 for the full Pro detail. Quotes are free per contractor. Architect fees are 8-10% of the work value.

Legend: complete · partial / depending on the party · not applicable

Ready to go through it yourself?

No account needed to start. You can stop at any time and nothing is saved until you explicitly ask.

Start your project

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