House-building costs 2026: what you really need to budget for a new build

Plot, house, ancillary construction costs, outdoor works and reserve: this guide walks through all the cost blocks of a new build — with an example calculation, a prefab-house-vs-solid-build comparison and the most important levers for saving.

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Quick answer

How high are house-building costs in 2026?

In 2026, house-building costs consist of several blocks: the plot (varies greatly by region, often €80,000 to €400,000), site development, the house itself (turnkey as a prefab house roughly €2,350 to €4,500/m²), ancillary construction costs of 15 to 20 percent, outdoor works and a reserve. For a 140-m² single-family house, the realistic total therefore usually falls between €520,000 and €720,000. The advertised "house price" covers only around 60 to 70 percent of the real spend. As of 2026.

Infographic

How much will building a house cost in 2026?

Total budget for a typical single-family home of 140 m²: ≈ €650,000 (guide value).

30%

54%

10%

Plot of land30%≈ €195,000
Varies greatly by region, site development included.
House (turnkey)54%≈ €351,000
140 m² living area, prefabricated house depending on the fit-out.
Additional construction costs10%≈ €63,000
Around 15–20% of the house price for real estate transfer tax, notary, soil survey and structural engineering.
Outdoor areas & reserve6%≈ €41,000
Driveway, terrace and garden plus a buffer for special requests.

Guide values, vary greatly by region · Prefabricated House

Six cost blocks that arise on a new build

Anyone planning the cost of a new house realistically thinks not in a single house price but in blocks. In 2026, these six items decide how expensive your new build really turns out to be.

Plot

€80,000 – €400,000

Highly region-dependent — city-edge locations sit well above rural municipalities.

Site development and utility connections

€5,000 – €15,000

Electricity, water, sewage and telecoms; higher on undeveloped plots.

Turnkey house

€2,350 – €4,500/m²

Prefab house depending on fittings and finish level; at 140 m² around €330,000 – €630,000.

Ancillary construction costs

15 – 20% of the house price

Grunderwerbsteuer (transfer tax), notary, building permit, structural engineering, surveying and insurance.

Outdoor works

€10,000 – €30,000

Driveway, terrace, garden, fence and parking space — often set too low.

Reserve and buffer

5 – 10% of the total cost

Plan for special requests, unexpected finds in the subsoil and price changes.

Worked example: 140-m² turnkey house

This is how the cost breakdown for a turnkey prefab house with 140 m² of living area on a mid-range plot might look. The figures serve as a realistic orientation, not a binding calculation. As of 2026.

Cost item	Amount
Plot (500 m²)	€150,000
Site development and utility connections	€12,000
Turnkey prefab house (140 m² × ~€2,800/m²)	€392,000
Slab foundation	€30,000
Ancillary construction costs (~17% of the house price)	€67,000
Outdoor works	€20,000
Reserve (~5%)	€34,000
Total cost (rounded)	€705,000

The plot price and ancillary construction costs shift the result considerably by region. Your own breakdown is quickest with the cost calculator. As of 2026.

Prefab house or solid build: which is more expensive

Prefab house

In 2026 the bare build costs per square metre are roughly on a par with solid construction — the former price advantage has gone as timber and manufacturing costs have risen. In return, the prefab house offers a short build time, high cost certainty through a fixed price and a standard Effizienzhaus-40 (energy-efficiency) standard that qualifies for KfW funding at no extra cost.

Solid build (Massivbau)

Brick-by-brick construction wins on individual planning, sound insulation and lasting value, but needs more build time and carries a higher cost risk through separate trades. In 2026 the total cost is determined less by the construction method than by the floor plan, fittings and provider.

To work out which construction method suits your budget, see the detailed comparison prefab house vs. solid build.

Estimating house-building costs realistically, step by step

The most common misjudgement on a new build is to equate the house-building costs with the advertised house price. In truth, in 2026 this price covers only around 60 to 70 percent of the actual spend. Anyone who wants to build a house and plan the costs cleanly therefore starts with an honest overall breakdown: plot, site development, the house itself, ancillary construction costs, outdoor works and a buffer. Only this sum forms the basis for the financing — not a manufacturer's catalogue price.

The most expensive and at the same time most variable block is the plot. Depending on location the range runs from around €80,000 in the countryside to over €400,000 in the commuter belt of the big cities. The house itself follows immediately: a turnkey prefab house costs about €2,350 to €4,500 per square metre of living area in 2026, depending on fittings and finish level. For 140 m² that's roughly €330,000 to €630,000. On top come the often underestimated ancillary construction costs of 15 to 20 percent of the house price — that is, Grunderwerbsteuer (transfer tax), notary, building permit, structural engineering, surveying and insurance.

The cost block also determines the monthly instalment on the financing side. With build interest rates of about 3.2 to 4.1 percent, every tenth of a percentage point saved adds up over the term to several thousand euros. So run your instalment, equity and term through the mortgage calculator before you sign a build contract. How the bare prefab-house costs per square metre and finish level break down is explored in more depth in our overview on the page prefab house costs & funding.

The strongest levers for saving on a new build

Anyone wanting to lower costs has several levers. The biggest is the finish level: a shell-finished house (Ausbauhaus), where you do the interior fit-out and painting yourself, often saves 10 to 20 percent compared with the turnkey version. A compact, ideally square floor plan without bays, dormers and offsets cuts build costs noticeably, because there is less wall, roof and foundation area. Doing without a cellar in favour of a slab saves €30,000 to €50,000 fast in 2026.

The fourth big lever is funding. Through the KfW programme Klimafreundlicher Neubau (KFN 297, climate-friendly new build) there is up to €100,000 in low-interest loan per residential unit; with the QNG label (KFN 298) even up to €150,000; families with children can reach up to €270,000 through the programme Wohneigentum für Familien (WEF 300, home ownership for families). As most prefab-house manufacturers deliver the Effizienzhaus-40 (energy-efficiency) standard as standard, the requirement is often met without extra cost. Our page funding at a glance brings together all the programmes and deadlines. Details on the discontinued Effizienzhaus-55 programme come directly from the KfW.

The last, often overlooked lever for saving is comparing providers. Every manufacturer costs identical fittings very differently — differences of several tens of thousands of euros are not unusual. Through our portal you can request offers from 140 vetted providers free of charge and without obligation, and choose from over 3.050 floor plans. That way you make your house-building costs transparent before you commit.

Key questions about house-building costs

Answers to the most common questions about total costs, ancillary construction costs, construction method and ways to save on a new build in 2026.

What does it cost to build a house in 2026?

Anyone building a house in 2026 should split the total cost into blocks: the plot (varies greatly by region, often €80,000 to €400,000), site development and utility connections (€5,000 to €15,000), the house itself (turnkey as a prefab house around €2,350 to €4,500/m²), ancillary construction costs (Baunebenkosten) of 15 to 20 percent of the house price, outdoor works (€10,000 to €30,000) and a reserve. For a 140-m² single-family house, the realistic total therefore usually falls between €520,000 and €720,000. As of 2026.

How high are the ancillary construction costs for a new build?

The ancillary construction costs (Baunebenkosten) come to around 15 to 20 percent of the bare house price in 2026. They include the Grunderwerbsteuer (real-estate transfer tax, 3.5 to 6.5 percent depending on the federal state), notary and land registry (around 1.5 to 2 percent), the building permit (Baugenehmigung), surveying, structural engineering and a soil survey, insurance during the build, and an energy consultant for the KfW proof. On a house price of €400,000 this quickly adds up to €60,000 to €80,000 — a block many homebuilders underestimate. As of 2026.

Is a prefab house cheaper than a Massivhaus (solid house)?

The bare build costs per square metre for a prefab house and a Massivhaus (solid/brick-built house) are roughly on a par in 2026; the prefab house's former price advantage has largely gone as timber and manufacturing costs have risen. The prefab house still wins on a short build time, high cost certainty through a fixed price, and a standard Effizienzhaus-40 (energy-efficiency) standard. Solid construction has advantages in individual planning and sound insulation. A cost comparison always pays off in the individual case.

How can I save costs when building a house?

The biggest levers are: taking on a higher finish level yourself (a shell-finished house instead of turnkey often saves 10 to 20 percent), a compact, square floor plan without bays and dormers, doing without a cellar in favour of a slab, and making full use of KfW funding. Comparing providers before signing the contract also cuts the price noticeably, because identical fittings are costed very differently from one manufacturer to another. As of 2026.

How much equity do I need for a new build?

In 2026 banks usually require at least the ancillary construction costs and part of the house price as equity — as a rule of thumb, around 20 to 30 percent of the total cost. With build interest rates of about 3.2 to 4.1 percent, more equity improves the rate and noticeably lowers the monthly instalment. Families with children can reduce the equity requirement via the low-interest KfW programme WEF (300, home ownership for families). It's best to run your instalment through the mortgage calculator. As of 2026.

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