Editorial review 2026-09-12 · Jurisdiction: Sweden — byggherreansvar as Boverket explains it
A kontrollansvarig does not take the builder’s duty — PBL 10:5 stays with the byggherre
Has a Swedish hall already handed the public-law duty to a contractor because a slide says “the KA owns the file”, or because a dated Plan and Building Act chapter 10 file has actually named the byggherre and left the duty there? Boverket’s builder-responsibility page, last changed on 1 July 2026 and published on 1 November 2012, says that in connection with building, demolition and ground works it is the byggherre who is responsible for following the applicable acts, ordinances, regulations and decisions. That remains true even if the measure does not need a lov or a notice. Planning and Building Act (2010:900) chapter 1 section 4 defines the byggherre as the one who, for their own account, carries out or lets someone carry out design, building, demolition or ground works. The builder need not be a natural person; a company, a municipality or a state authority can hold the role. Chapter 10 section 5, in the wording Boverket quotes as amended by Act (2026:712), says the builder is responsible for every building, demolition and ground measure that the builder carries out or lets someone carry out, and for the design that underlies the measure, meeting the requirements that apply under the Act or under regulations or decisions issued under it. Section 5 a says the builder shall see that a lov- or notice-duty measure is checked under the control plan and the waste-handling plan that the committee fixes in the startbesked. Those are statute and agency sentences. They are not a reserved megawatt, not a civil AB/ABT contract and not a Meta Luleå, Microsoft Gävle–Sandviken–Staffanstorp, Google Horndal, EcoDataCenter Falun or atNorth SWE04 handover. The control-plan page already owns the KA’s assistance. The startbesked page already owns the start gate. This page only asks which published builder-duty object the hall file is sitting on. This is orientation, not counsel.

General orientation. Assess the specific project separately. Applies to: Readers placing a contractor-owns-it, KA-signed-off or responsibility-handed-over sentence on a Swedish hall construction file.
Reading order
Name the person before you name the contractor. The byggherre is the one who, for their own account, carries out or lets someone carry out the works. A KA assists. A byggbedömare certifies later rows. A civil AB or ABT contract sits on another track. Write who is named as builder in the lov file before you say the hall “has handed the duty over.”
Then keep the public-law track on its own row. Boverket writes that the building process has two tracks: a public-law track under the Plan and Building Act and a civil track under the industry’s standard contracts. If a defect appears, the committee can require the builder to put it right even if the builder did not cause it. Cost recovery between builder and contractor is a later civil desk.
Then keep the papers the builder must file on separate rows. Section 18, as Boverket quotes it after Act (2026:712), says the builder shall, no later than five working days before the technical consultation, or within the time the committee sets, give the committee the proposed control plan and waste-handling plan and the technical documents needed for the startbesked. Sections 3 and 34 remain the start and finish gates.
Then keep named project rows as paper classes. Microsoft names Gävle, Sandviken and Staffanstorp. EcoDataCenter names Falun. Google names Horndal. atNorth’s SWE04 note names Sollefteå. evroc names Arlandastad. None of those pages is a section 5 duty, a section 18 filing or a named builder in a lov file.
- Named builder before any contractor-owns-it slogan.
- The KA assists; the public-law duty stays with the builder.
- Section 18 is a filing clock, not a handover.
- A campus press note is geography, not a named builder.
What the duty actually measures
The duty measures a public-law row, not a reserved hall megawatt. Boverket says the builder is responsible even where no lov or notice is needed, including design, siting and technical-property requirements. A slide that says “no permit, so no builder” has lost that sentence.
A notice duty measures later sections, not a silent waiver. Section 5 b says the builder shall tell the committee if it is obvious that a byggbedömare used for the lov test has neglected the task. Section 5 c says changed particulars about the builder, byggbedömare, kontrollansvariga or certifiers shall be given without delay. Sections 11 b and 12 c say the builder shall immediately tell the committee if a KA or an expert is not doing the job. Section 11 c says the builder shall propose a new KA if the old one leaves.
Attendance measures interest, not a transfer. Boverket says the Act does not require the builder to sit in the technical consultation, the workplace visit or the slutsamråd, but the builder still holds the full duty and therefore has a strong interest in being there. A diary that shows only the KA in the room has not moved the duty.
Keep other-law desks off this row. Boverket says the builder may also have duties under other acts; those sit in those acts, not in the Plan and Building Act. A climate-declaration filing, an energy declaration and an environmental-report row remain later pages.
What named primary sources show
Boverket’s builder-responsibility page remains the dated agency desk for the definition, the section 5 duty, the two-track sentence and the filing clock. Keep those objects attached to chapter 1 section 4 and chapter 10 sections 5 to 5 c and 18. Do not invent a data-centre paragraph.
The control-plan page, the technical-consultation page and the startbesked page remain other desks. Named operator rows remain land and event papers. They do not, in the files used here, name a byggherre for a named Swedish hall.
A matrix instead of a handover slogan
Draw one page with paper rows and evidence columns. Named builder, KA, byggbedömare, civil contract, section 18 filing and startbesked are different rows. Who is named, which measure and which date are different columns. Empty cells stay empty.
Do not invent a Swedish hall handover of public-law duty from a contractor slide.
| Object | What a source can show | What this page will not invent |
|---|---|---|
| Who | PBL 1:4 — the one who, for their own account, lets the works be done | A contractor as the public-law builder |
| Duty | 10:5 — every measure and the underlying design, even without lov | A reserved hall megawatt |
| KA | 10:11 — assists; does not take the duty | A KA signature as a handover |
| Filing | 10:18 — five working days before technical consultation | A campus press note as a named builder |
Common misreads
The first misread is to treat a KA or a contractor as the public-law builder. Section 5 stays with the named builder. The second is to treat a civil handover as a public-law handover. The third is to treat “no lov” as “no builder.”
The fourth is to treat the builder’s absence from a meeting as a transfer. The fifth is to collapse section 18 into a startbesked. The sixth is to use a campus town as proof that a named builder already sits in a dated lov file.
What to ask next
Ask which dated paper anyone is quoting — a named builder in a lov file, a section 18 filing, a KA appointment, a civil contract, or only a slide — and which measure it names. Ask whether the public-law duty has been treated as handed over.
Then open the control-plan page, the technical-consultation page and the startbesked page. If the operator will not name the builder, record the gap. Do not fill it from a handover slogan. This page is not legal advice.
- Is the live paper a named builder — or only a contractor slide?
- Has the KA been treated as holding the public-law duty?
- Has a civil contract been treated as a public-law handover?
- Has “no lov” been treated as “no builder”?
- Has a campus town been treated as a named builder?
What this does and does not prove
This page proves that Boverket already publishes the byggherre as the public-law duty-holder even without a lov, and that a KA does not take that duty — and that those facts are not a reserved hall megawatt.
It does not prove that a named Swedish hall holds a dated named builder. It does not invent a handover for Horndal or Arlandastad. It does not treat a campus press note as a section 5 file.
Empty cells stay empty. Until a later primary source names the builder, the filings and the dated lov file, the builder-duty clock stays a method, not a census. DataCenterSweden records the method.
Sources
- Boverket — The builder’s responsibility — Boverket, 2012-11-01. Checked 2026-09-12.
- Planning and Building Act (2010:900) — Sveriges riksdag, 2010-07-01. Checked 2026-09-12.
- Planning and Building Act guidance — Boverket, 2026-01-01. Checked 2026-09-10.
- Boverket — Startbesked (PBL Knowledge Bank) — Boverket, 2026-07-01. Checked 2026-09-12.
- Boverket — Technical consultation (tekniskt samråd) — Boverket (publication date not stated). Checked 2026-09-12.
- Microsoft opens its sustainable datacenter region in Sweden — Microsoft, 2021-11-16. Checked 2026-09-10.
- EcoDataCenter 1, Falun — EcoDataCenter, 2026-01-01. Checked 2026-09-10.
- Horndal, Sweden – Google Data Center Location — Google Data Centers, 2026-09-01. Checked 2026-09-11.
- New 300MW mega site in Sollefteå, Sweden — atNorth, 2026-02-23. Checked 2026-09-11.
- evroc finalizes land purchase in Arlandastad, Stockholm — evroc, 2025-02-03. Checked 2026-09-10.