How this is calculated
The construction sum is the area times the price per m². The standard prices are our own example cases, incl. VAT:
| Level | New house, extension, holiday home | Conversion and refurbishment | The example case behind the figure |
|---|---|---|---|
| Ordinary · limited | 24,000 | 15,000 | K3: 180 m² for DKK 4.3m · K1: 51 m² for DKK 750,000 |
| High · comprehensive | 28,000 | 24,000 | K4: 220 m² for DKK 6.16m |
| Exclusive · high level | 45,000 | 28,000 | K5: 250 m² for DKK 11.25m |
The price varies with region, market and solutions. Small extensions and extensions with a kitchen or a bathroom cost more per m² than a whole house, because the junction with the existing building and the fixed items are spread over fewer square metres.
The fee is the class's percentage of the construction sum. If you choose steps 1–3, the fee is the included phases' share of the full fee, rounded to the nearest DKK 500. It is the same calculation as the fee calculator on the price page — and the one the proposal is built on.
The class follows your answers. What is to happen gives 0 points for an extension or a conversion, 1 for a new build and 2 if load-bearing structures change; the questions in block 2 give 0, 1 or 2 points each. The total gives K1 (0–1), K2 (2–3), K3 (4–6), K4 (7–8) or K5 (9 and above) — the same questions as on the price page. The final class is set in phase 0 and is stated in the proposal.
The contingency is a percentage of the construction sum. The financial framework in the design brief works with 8 %; below 4 % we warn you, because there is then no room for what the site or the existing house is hiding.
This is not in the figure
- The site and the transaction costs of buying it.
- Connection charges for sewerage, water, electricity and district heating on a new build.
- Structural engineer and fire consultant — they produce the structural documentation and the fire documentation in every class and must be certified from class 2. You agree and pay directly with them.
- Site management, trade supervision and handover — our service ends when the contractor has been chosen.
- Interest and fees on construction loans and mortgage loans.
- Moving, temporary accommodation, furnishings and landscaping that are not part of the construction sum.
The complexity classes
| Class | Fee | Example | Construction sum | Fee, from |
|---|
A single-storey house on a flat site is K2. A modest house on a sloping site in a district worthy of preservation is K4. If it turns out in phase 1 that the site was hiding something, we say so at the gate — with a new class and a new price, before we go on.
An estimate is not a proposal.
The proposal is built on the same calculation — but with the class set after a meeting where we have seen the site and heard what you want. 30 minutes, online or at your home. No charge.
Send us the estimate →The button opens your own email program with the estimate written in. Nothing is sent until you press send yourself.
info@synegro.dk · +45 93 60 24 30 · weekdays 9–17