Renovation of your home in Slagelse.
Slagelse Municipality was formed by the merger of Hashøj, Korsør, Skælskør and Slagelse municipalities and has approximately 78,000 inhabitants. Slagelse town is the natural centre, while Korsør at the Great Belt and Skælskør at the inlet give the municipality a varied geography with both urban and coastal areas. The municipality is in the Zealand Region with good rail connections to Copenhagen.
Slagelse in brief — context for your renovation.
trainThe nearest town to the Great Belt
Slagelse and Korsør are closely connected to the rest of Denmark via the Great Belt Bridge and the railway. The train journey to Copenhagen takes approximately 1 hour — making the municipality a commuter-friendly location.
landscapeCoastline and varied nature
The municipality encompasses Korsør Inlet, Agersø and Omø — harbour towns and islands with recreational potential. Coastal proximity is an important argument for the housing market.
homeMixed housing stock
Slagelse has a relatively even distribution between detached houses (40%) and flats (40%), reflecting the municipality's mix of urban and suburban areas. House prices are moderate for Zealand.
Your housing type.
Detached house from 1960–1990
40% of homes in Slagelse — approx. 17,200 dwellings (source: Statistics Denmark 2025)
Detached houses in Slagelse and the surrounding towns. Prices are lower than in West Zealand's more expensive municipalities but above West Jutland level. Renovation investments are generally profitable with good access to Copenhagen.
What's typical?
- — Brick exterior walls
- — Pitched roof with concrete tiles
- — SK Forsyning district heating (town) or individual heat pump
- — Garden 500–900 m²
Common weaknesses
- — Insufficient loft insulation
- — Ageing roof covering
- — Outdated bathroom and kitchen
- — Older windows
Typical costs
Do you need an architect?
Probably not necessary for:
- — Roof replacement with same material
- — Extension under 50 m²
- — Interior renovation
Architect recommended or required for:
- — Extension over 50 m²
- — Facade changes
- — Loft conversion
Flat from 1950–1980
40% of homes in Slagelse — approx. 17,200 dwellings (source: Statistics Denmark 2025)
Flats are almost as numerous as detached houses in Slagelse — a large share located in Slagelse town and Korsør. Many social housing units with renovation needs.
What's typical?
- — 3–6 storeys in brick
- — District heating
- — Shared installations
Common weaknesses
- — Ageing flat roofs
- — Outdated plumbing
- — Insufficient facade insulation
Typical costs
Facade renovation with insulation
1,350–2,600 kr/m²
Including new surface finish and thermal insulation. . Source: Bolius
Do you need an architect?
Probably not necessary for:
- — Interior flat renovation
Architect recommended or required for:
- — Facade renovations
- — Lift installations
Terraced house from 1970–1990
17% of homes in Slagelse — approx. 7,200 dwellings (source: Statistics Denmark 2025)
Terraced houses spread across the municipality's towns. Good access to beach life and nature — especially in the Korsør area.
What's typical?
- — Brick terraced houses
- — Pitched roof
- — District heating or individual heating
Common weaknesses
- — Insufficient insulation
- — Older windows
Typical costs
Do you need an architect?
Probably not necessary for:
- — Interior renovation
Architect recommended or required for:
- — Extension
- — Facade changes
Local conditions in Slagelse.
local_fire_department District heating — SK Forsyning
District heating is available in Slagelse town and Korsør via SK Forsyning and local heating works. Slagelse Municipality is working to expand district heating roll-out to more parts of the municipality. Check the municipality's district heating map for your address.
www.slagelse.dk/da/service-og-selvbetjening/bolig-og-byggeri/el-og-varme/fjernvarme
account_balance Heritage value
Slagelse contains historic urban environments in Slagelse and Korsør. Korsør Castle and the harbour quarter are heritage-rated. If your home is in a heritage conservation environment, facade changes may require prior approval.
Look up your address at the Danish Heritage Agency's FBB register
assignment Building permit in Slagelse
Apply for a building permit via Byg & Miljø on Slagelse Municipality's website. Interior alterations normally do not require a permit.
savings Grants for energy renovation
Grants for energy renovation via Sparenergi.dk. SK Forsyning can advise on district heating connection.
Slagelse in figures.
Data from Statistics Denmark (2025) and the Danish Heritage Agency — context for your property.
Dwellings total
7% vacancy rate
Listed buildings
Source: Danish Heritage Agency FBB
Social housing units
Source: Landsbyggefonden
CO₂ emissions by sector
Energy
105,198 tonnes CO₂
Transport
222,319 tonnes CO₂
Chemical processes
4,886 tonnes CO₂
Agriculture and land use
57,796 tonnes CO₂
Waste disposal and biogas
6,382 tonnes CO₂
Wastewater
1,768 tonnes CO₂
Frequently asked questions
about renovation in Slagelse.
Yes — with good rail connections to Copenhagen and moderate house prices, Slagelse is attractive. Energy renovations pay off especially well, and a well-renovated home stands out in the market.
Yes, SK Forsyning supplies district heating to Slagelse town and Korsør. The municipality is working on expansion. Check the municipality's district heating map at slagelse.dk for your specific address.
Zealand prices are close to, but slightly below, Greater Copenhagen level. Get 3 quotes from local tradespeople and plan 2–4 months ahead.
Yes — especially in Korsør's historic harbour quarter and in parts of Slagelse town. Check the FBB register and the municipality's local plans before planning facade changes.
Loft insulation, new roof and energy windows give the best profitability. With SK Forsyning's district heating, energy savings are especially attractive. A renovated bathroom significantly boosts the home's market appeal — especially for Copenhagen commuters.
Next steps.
District heating in Slagelse and Korsør
SK Forsyning covers the major towns — and more are coming. Check your area.
assignmentBuilding permits in Slagelse
What can you do without a permit — and what requires approval?
buildRenovation that suits the market
Plan your investment correctly — avoid over-building, maximise value.
Tell us about your project in Slagelse.
We help homeowners in Slagelse prioritise renovation and get started — from the first assessment to completed project.
Start your dream here