Tenement building renovation Vienna that gives the building another 130 years.

Tenement building renovation Vienna: costs 2026

The range of €1,500 to €3,000 per square metre is explained by the scope. What matters is not the fittings but how much of the building fabric is touched. Net guide values, as of 2026, binding after site visit and survey of the existing building.

Unit prices, so you can check a quote

A lump sum of €1.8 million cannot be assessed. These unit prices are the yardstick for every item in a Viennese tenement renovation offer.

For our way of working and the trades, see construction company Vienna.

Subsidy: the point at which the calculation is decided

Without subsidy, a tenement renovation is a loss-making business. With subsidy, it becomes viable. In Vienna this runs via wohnfonds_wien, and the rules are strict but predictable.

Basic renovation or total renovation?

The decision is rarely free. It depends on whether the building is occupied and whether the tenancies are subject to the MRG (Tenancy Act).

Renovating a tenement building on a limited budget: the order decides

Few owners do everything at once. Anyone who wants to renovate a tenement building but cannot raise the entire sum at once first decides on the order — and that decides the total cost. In the wrong order, the same tenement renovation ends up costing 20 to 30 % more, because work has to be done a second time.

The rule behind it is simple: from top to bottom, from outside to inside. Everything that lets water into the building comes first. Everything that needs scaffolding comes together. Everything that involves chiselling into walls comes before the fit-out.

The exception concerns subsidies. wohnfonds_wien subsidises packages, not individual parts. Anyone who has their tenement building renovated in stages and applies for each stage separately receives considerably less in total than with a bundled basic renovation — often a subsidy rate 10 to 15 percentage points lower. That is why you should calculate both routes before deciding on stages: the bundled variant is often the cheaper one despite the higher one-off sum.

What can easily be separated: courtyard, staircase and basement renovation. They depend on no deadline and no scaffolding. Anyone who has to save on a tenement renovation postpones these three — not the roof.

How a tenement renovation works

The components of a Viennese tenement building and what they need

Roof: the most expensive damage if you wait

Viennese Gründerzeit roofs are mostly purlin roof structures with plain-tile or interlocking-tile covering, many dating from the 1950s after war damage. Typical findings: soaked rafter ends at the eaves, leaking valleys, tinsmith work at the end of its service life, chimneys without flashing.

• Re-roofing €180–320/m², including stripping, roofing underlay, battens, covering and disposal.
• Rafter ends affected by decay are cut off and spliced – this belongs in the structural engineering, not to gut feeling.
• Attic floor insulation is the measure with the best cost-to-effect ratio: €35–70/m², noticeable in every utility bill of the building.
• Tinsmith work – do not save on it. Valleys, junctions and gutters are where roofs start to leak, not the tiled area.
• Photovoltaics is only planned in if the roof is being redone anyway; mounting it later on an old roof is burning money.

Facade: the street side is a monument, the courtyard side is physics

The street facade of a Gründerzeit building bears stucco, cornices, window surrounds and often figures. In a protection zone, MA 19 decides on every change to the appearance. As a rule, no insulation is applied there – the facade is repaired, stucco replaced, rendered and painted.

The courtyard facade is usually unadorned. There an external thermal insulation composite system (ETICS) is permitted and sensible: €120–190/m², with a noticeable effect on heating demand and entitlement to THEWOSAN subsidies. Combining both – repair at the front, insulation at the back – gives the best compromise between requirements and effect.

• Scaffolding stands for 4 to 8 months on tenement buildings and costs €12–22/m² per month. Therefore: all facade work in one go.
• Stucco repair is done by casting existing elements, not with prefabricated parts from a catalogue.
• The plinth needs renovation plaster and often a horizontal barrier – rising damp destroys any new paint within two winters.
• Window sills, downpipes, lightning protection belong on the same site, otherwise the scaffolding is put up twice.

Risers: invisible, but the most common cause of water damage

Lead until the 1930s, galvanised steel until the 1970s. Both are at the end of their service life today. Replacing a riser costs €25,000 to €60,000 per stack and is the point at which a renovation becomes noticeable for the residents: two to three weeks without water in the apartment.

• New shafts in drywall with access panels, usually fire-rated F90 in the staircase.
• Water meter per apartment at the same time – a prerequisite for consumption-based billing.
• Waste water encased with sound insulation, otherwise the whole building hears every flush.
• Gas pipes via a licensed gas and plumbing engineer (§ 94 no. 25 GewO), with a leak-tightness test and record.
• Site kitchen and shower container in the courtyard during the riser phase – costs €4,000 to €9,000 but prevents rent reductions and disputes.

More on the riser pipe replacement Vienna page.

Windows: refurbish or replace

On the courtyard side replacement is almost always permitted, on the street side rarely. The decision is not made by the client alone but by MA 19 – that is why it belongs before the cost estimate, not after it.

Staircase, basement, courtyard

These areas cost little relative to the total, but they decide how the renovated building is perceived – by tenants, prospective buyers and valuers.

• Staircase €120–260/m²: repair plaster, grind terrazzo, derust and paint railings, LED lighting with motion detectors.
• Basement: damp-proofing against rising damp, renovation plaster, new lighting, lockable compartments. See basement renovation Vienna.
• Courtyard: drainage is more important than appearance. A courtyard without a fall sends water to the basement wall.
• Bin room and bicycle storage are a real argument when re-letting and cost little.

Six things that only exist in Viennese Gründerzeit buildings

1. Timber beam ceilings and dowelled floors

More than 60 % of old Viennese apartments have timber beam ceilings. They bear loads, but limited ones: 150 to 250 kg/m² is usual, no more. This decides on screed build-ups, bathtubs, drywall partitions and lift shafts. In every renovation the load-bearing capacity must be checked before anything is planned – not afterwards.

2. A bathroom niche instead of a bathroom

Category C and D apartments often have no bathroom of their own but a niche in the kitchen and the toilet in the corridor. As part of a basic renovation apartments can be upgraded in category – this is relevant under tenancy law and eligible for subsidies, but requires the tenants' consent or a change of tenant.

3. Existing gas boilers

Installed in Vienna in their millions. When replacing risers the question always arises: the boiler stays, the boiler is replaced, or the building switches to district heating. The third variant is the most future-proof but needs space for the transfer station and an agreement with all tenants.

4. Protection zone and MA 19

Large parts of the Gründerzeit stock lie in protection zones. There, every change to the external appearance is subject to assessment: facade, windows, roof structures, balconies, advertising. This is not an obstacle but a time factor – allow two to four months.

5. Substandard and categories

Apartments without a bathroom or without a toilet in the apartment are category D. Upgrading to category A is eligible for subsidies and raises the permissible rent – legally sound only with consent or on re-letting. This is the lever with which a renovation pays off in the long term.

6. Confined sites

Inner-city tenement buildings have no storage space. Material arrives just in time, rubble goes down the chute, parking lanes need a permit from MA 46. In streets with trams or cycle lanes every delivery becomes a scheduling matter. Anyone who does not plan for this loses weeks.

The existing condition should be recorded just as early: before work involving vibration or load changes, a pre-construction condition survey documents the condition of the apartments and the neighbouring buildings – this saves the later discussion about which crack was already there.

Pollutants: what is in Viennese tenement buildings

Before the first demolition, it must be checked what has been installed. This is not a formality – it decides on disposal costs and occupational safety.

Sampling costs €800 to €2,500 and is the cheapest item on the entire site – measured against what an undetected asbestos finding during construction triggers.

Tenancy law: what you may do, what you must do, what it brings

In a tenement building with old tenancy agreements, the Tenancy Act (MRG) is the most important factor in the whole calculation – more important than any construction price.

Rent reduction during construction

Tenants can reduce the rent in the event of significant impairment – scaffolding in front of the window, noise, water shut-offs. This can be calculated and belongs in the cost planning: 5 to 15 % of the annual rent during the construction phase is realistic. Organising a site kitchen, shower containers and clear announcements reduces this item considerably – and prevents proceedings.

Does it pay off? The three figures that matter

The ten most expensive mistakes in tenement renovations

• Starting before the subsidy commitment. The most common and by far the most expensive mistake. Entitlement gone, six figures.
• No main rent statement. Without a § 20 statement no § 18 procedure, without § 18 no refinancing.
• Insulating the facade without clarifying with MA 19. Removal at your own expense, plus proceedings.
• New roof, old pipes. Two years later the staircase is torn open again and the scaffolding comes a second time.
• No pollutant sampling. An asbestos find during demolition stops the site for weeks.
• Tenants informed too late. Leads to rent reductions, complaints and delays that were avoidable.
• Load-bearing capacity of the ceilings not checked. Screed, bathroom or lift shaft planned that the ceiling cannot carry.
• Scaffolding put up too early. Every month costs €12–22/m². With 900 m² of facade, that is up to €20,000 a month.
• Separate contracts with twelve firms. Nobody is responsible for interfaces; every extra charge is borne by the owner.
• No photo documentation. What was closed up cannot be proven later – neither to the subsidy body nor to the insurer.

How to check a tenement renovation offer

Three examples from practice

Example 1 · 16th district, 1,200 m², basic renovation in an occupied building

Existing condition: roof from 1958 leaking, courtyard facade uninsulated, galvanised risers, staircase unchanged for 40 years. Carried out: re-roofing with attic floor insulation, courtyard facade with 14 cm ETICS, street facade repaired with stucco replacement, three risers renewed, staircase renovated, courtyard drained. Construction time 11 months in an occupied state. Cost €1,410,000 net, i.e. €1,175/m². wohnfonds_wien subsidy 34 %, owner's share around €930,000, refinanced under § 18 over 15 years.

Example 2 · 3rd district, 800 m², individual measure with follow-up costs

In 2023 the owner had only the roof renewed, without a subsidy application, because it had to be done quickly. In 2026 the facade followed – scaffolding a second time, €38,000 for that alone. Had both been submitted together, around €210,000 in subsidies would have been granted. That is the most expensive way to save time.

Example 3 · 15th district, 1,600 m², renovation with loft conversion

Basic renovation combined with the conversion of four new apartments in the roof. The new units financed a considerable part of the renovation. Construction time 19 months, of which 5 months were procedures. The lift was retrofitted at the same time – considerably cheaper as part of the basic renovation than on its own. Details on loft conversion Vienna.

Who we restore for

Why Skyline Bau

• In Vienna since 2014, focusing on renovation of occupied Gründerzeit buildings.
• Reference: Austrian Parliament building, Vienna 2022: drywall, painting and flooring work on the second basement level on behalf of W+R Schirmungstechnik GmbH – a site with access control, fixed time windows and complete documentation.
• Own execution of the non-regulated trades: demolition, strip-out, drywall, screed, tiling, painting, insulation, earthworks.
• Licensed partner firms for master-builder services, structural engineering, gas, plumbing and electrics – named in the offer, with proof of licence.
• Fixed price instead of time and materials, 3-year warranty under § 933 ABGB, 10 years on the roof waterproofing, construction liability insurance €3 million.

When you do not need us

If only the roof is leaking and nothing else is due, call a roofer. If the building is going to be sold in the foreseeable future, a full renovation is rarely the right decision – then watertightness, a tidy staircase and clean documents count. And if the rent reserve is high enough to carry maintenance on its own, you need neither a § 18 procedure nor advice on it. We tell you this at the site visit, even if it means losing an order.

Basic renovation in Vienna step by step: from concept to final account

A basic renovation is not a single construction contract but a procedure with a fixed sequence. Knowing it lets you plan realistically when construction will take place and when the subsidy money will flow.

1. Survey of the existing building: condition of the roof, facade, pipes and load-bearing structure, plus a list of all apartments with category, tenancy and vacancy. Without this list, neither subsidies nor calculations are possible.
2. Renovation concept: the planner determines what will be done, in which stages and with which cost estimate. This is also where the decision is made whether the loft is included right away.
3. Application to wohnfonds_wien: it is submitted before construction starts. wohnfonds reviews the concept and costs before issuing a subsidy commitment – this takes time, and this time belongs in the schedule.
4. Informing the tenants: in a renovation of an occupied building, the residents are informed early and in writing, usually with a meeting in which the process, construction times and contact details are explained.
5. Tendering and award: bills of quantities by trade, comparison of offers, contract based on ÖNORM B 2110.
6. Construction phase: from top to bottom, with ongoing cost control against the subsidy commitment.
7. Final account: invoices, proofs and photo documentation go to the subsidy body. Only then is the subsidy final.

As general contractor, we take on the execution from step 5 and provide the documents needed for the final account. Planning and permit application are handled by licensed planners.

Costs in addition to construction costs: what owners should also budget for

The square-metre prices of a renovation describe the construction. For financing a tenement building, further items are added that are often missing in initial discussions:

• Planning and specialists: architecture, structural engineering, building physics and building services planning, and for comprehensive projects also site supervision.
• Authority procedures: permit documents, fees and the permit for scaffolding and barriers on the pavement.
• Occupied site: temporary water and power supply, site kitchen during the riser phase, possible rent reductions.
• Bridge financing: subsidies are paid according to construction progress or at the end; the invoices come earlier.
• Reserve for hidden damage: rotten beam ends, dry rot in the attic, cracks under hacked-off plaster. A reserve of 10 to 15 % of construction costs has proven realistic for buildings of this age.

Anyone who plans for these items from the start does not have to choose between quality and budget during construction. In old buildings especially, this is the most common reason why renovations stall halfway.

Tenement building, Gründerzeit building, old building: which page covers what

The terms overlap; the questions behind them do not. This page covers the tenement building (Zinshaus) as a rented property: subsidies, tenancy law, economic viability and renovation in an occupied building. If you are looking for the construction technology of the turn of the century – timber beam ceilings, stucco facades, box windows – in detail, you will find it under Gründerzeit building renovation. For individual apartments in old buildings, old building renovation is the right starting point.

Frequently asked questions about tenement building renovation in Vienna

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