Modular Homes & Passivhaus Blog
Expert guides on Passivhaus certification, modular construction, timber-frame science, and prefab housing. Written by our team of architects, engineers, and sustainability consultants.
Passivhaus
Everything about the world's most rigorous energy-efficiency standard, how it works, what it costs, and why it matters for your next home.
What is a Passive House? Price, Savings, and the Full Process
A complete guide to Passivhaus certification, what it means, how much it costs, and the real energy savings after 3 years of living in one.
Passive House vs nZEB: The Real Difference
Both promise energy efficiency, but one delivers up to 4× better results. Here's what separates Passivhaus from Nearly Zero-Energy Buildings.
Is a Passive House Worth It in 2026?
An honest ROI analysis of building Passivhaus, upfront costs, energy savings, resale value, and the break-even point.
Passive House Savings: What the Evidence Shows
Measured heating consumption, current BioBuilds specifications and a clear method for estimating energy savings.
Passive House Certification: 5 Criteria, 3 Classes & The Complete Process
Passive House certification explained: the 5 principles, the Classic, Plus and Premium classes, and each step from PHPP to the blower door test.
Passive House Running Costs: Full Breakdown
What sets a Passive House energy bill: heating demand, equipment, tariffs and household use, with a sourced calculation and current BioBuilds data.
Passive House in a Hot Climate: Does It Work in the South?
A passive house can stay cool in Spain and other hot climates with the right shading, ventilation, humidity control and cooling designed for the site.
Modular
How modular construction is changing the game, factory precision, faster timelines, and the real costs of building smarter.
How We Build a House in 3 Weeks
From raw timber to move-in ready, a behind-the-scenes look at BioBuilds factory production, quality control, and delivery.
From Factory to Your Land
How a completed module travels from the production line to your plot, logistics, transport, and what happens on delivery day.
Modular vs Traditional Construction: Full Comparison
Side-by-side comparison of modular and traditional building, cost, timeline, quality, and flexibility across 12 key factors.
How Much Does a Modular Home Cost in 2026?
The European modular market compared: price tiers, manufacturer ranges, what turnkey quotes include, and how certified performance changes the math.
7 Expensive Mistakes When Buying a Prefab Home
Mismatched offers, missing site budgets, skipped certification proof: the seven expensive prefab-buying mistakes and how to avoid each one.
Single-Story Home: The Case for Living on One Level
A single-story home keeps every room on one level but needs more buildable plot area. Compare planning rules, energy use and BioBuilds' single-story range.
Tiny House or Small Home: What 48 m² Really Gives You
Tiny houses offer compact living; a small permanent home adds space. Compare layouts, permits and BioBuilds Wanderlust 48 prices for year-round living.
Timber-Frame
Why timber is the most advanced building material, fire safety, sustainability, and the science behind modern wood construction.
Timber-Frame Homes: Safety, Sustainability, and the Truth About Wood
Is wood safe? Is it durable? Does it burn? A comprehensive guide to modern timber-frame construction and why it outperforms concrete and steel.
Timber-Frame vs CLT: Which is the Better Choice?
Two wood-based systems, very different approaches. Here's how timber-frame and cross-laminated timber compare for residential builds.
What Actually Makes a Home Sustainable?
Greenwashing vs real sustainability, the measurable criteria that determine whether a home is truly eco-friendly.
The Health Benefits of Timber Interiors: How Wood Improves Wellbeing
Research shows timber interiors reduce stress, lower blood pressure and improve air. The science of biophilic design, and why 45% wood coverage is optimal.
Timber Frame vs Masonry: Fire, Earthquakes, and Lifespan
Timber vs masonry on the evidence: predictable char rates under fire, Eurocode 8 seismic performance, and an 80+ year design life.
How Long Does a Timber-Frame House Last? An Honest Answer
How long a timber house really lasts: moisture management, the factory-dry build, what the warranty covers, and the maintenance that matters.
EUDR Timber Rules: What Home Buyers Need to Know
EUDR covers timber and prefabricated wooden homes from 30 December 2026, with later dates for some small firms. Private home buyers have no duties.
Prefab
The truth about prefab homes, debunking myths, comparing to traditional builds, and understanding the real timeline and costs.
Prefab Homes: Price, Speed, and What Nobody Tells You
The complete guide to prefab homes, real prices, real timelines, and the honest pros and cons that salespeople won't mention.
Prefab House vs Traditional House: Pros and Cons
A fair comparison between factory-built and site-built homes, where prefab wins, where traditional wins, and where it depends.
Prefab Home Myths and Truth
Are prefab homes cheap? Do they fall apart? Can you customize them? Debunking the 8 most persistent myths about factory-built homes.
How Long Does It Take to Build a Prefab Home?
From order to move-in: a week-by-week timeline of the prefab construction process, including the steps most people forget.
Prefab Home Prices in Europe: The 2026 Guide
Published prices, not quote forms: what a prefab home costs per m2 in 2026, semi-finished vs turnkey, and the site costs every manufacturer leaves out.
Buying a Prefab Home: Process, Contract, Pitfalls
The seven steps from first click to keys, the contract clauses that protect you, the payment shape to demand, and the pitfalls that cost real money.
How to Compare Prefab Home Manufacturers: 9 Criteria (2026)
A 9-criteria scorecard for comparing prefab manufacturers: certification proof, fixed contract price, warranty, references and delivery inclusions.
What €100k, €200k and €300k Buy in a Prefab Home (2026)
What €100k, €200k and €300k actually buy in a European prefab home in 2026, from published list prices, including what each tier can't get you.
Turnkey vs Semi-Finished vs Shell: What's Included
Turnkey, semi-finished, or shell: what each finish level actually includes, item by item, and where the price difference really goes.
Buying a Prefab Home From Another EU Country
You can buy a prefab home from another EU country. Local permits and site work still apply; your offer confirms VAT, delivery, payments and warranty.
House in Spain, Italy or Greece: A Prefab Holiday Home
A prefab holiday home in Spain, Italy or Greece needs a buildable plot and local permits. Plan cooling, delivery and VAT before ordering the house.
The Process
Everything before the house arrives: permits, land, foundations, and the true all-in costs of a building project.
Prefab Home Site Costs: What Sits Outside the House Price
Site costs for a prefab home include permits, foundations, crane rental and utility hookups. See BioBuilds starting estimates and what your plot needs.
Prefab Home Foundation Costs: Slab, Basement, or Ground Screws?
The three foundation options compared on cost, time, and soil, and why the geotechnical report should make the call, not tradition.
Building Permits for a Prefab Home in Europe: 2026 Guide
Building permits for prefab homes across Europe: who issues them, what documents you need, realistic timelines and what the manufacturer handles.
Choosing a Plot for a Prefab Home: The 2026 Checklist
Paperwork, soil, utilities, and the fourth check most guides skip: truck access and crane position. The plot checklist before you buy land.
Modular Home Financing: Mortgages and Stage Payments
Modular home financing: how mortgages work for a factory-built home, stage payments matched to production, the BioBuilds schedule and public programs.
Modular Home Timeline: From Contract to Move-In
BioBuilds factory production takes about three weeks for a standard model. Permits, the production slot, site works and connections set the move-in timeline.
Modular Home Delivery: Arrival and Installation
What happens when a modular home is delivered: access checks, the crane, inspection on the trailer, placing the modules on the foundation and the days after.
Prefab Home Insurance: Cover for Timber Homes
Arrange prefab home insurance for unloading and assembly before delivery. Learn what insurers need to know about timber construction and how warranties differ.
New Home Warranty in the EU: Three Layers of Protection
A new home in the EU may have three layers of protection: the legal guarantee for goods, national building liability and voluntary manufacturer warranties.
Energy
Measured energy performance: heating costs, heat pumps, ventilation with heat recovery, standards, and the subsidies that reward them.
Subsidies for Energy-Efficient Homes in Europe (2026)
KfW 297 ceilings, QNG requirement, Austrian Wohnbauförderung and Romania's Casa Verde: how efficiency-home subsidies actually work across Europe in 2026.
Heat Pump Cost in a New Build: The 2026 Guide
Installed heat pump costs in 2026, and why a Passivhaus-level envelope needs a far smaller system: sizing, price ranges, and what that saves.
Passive House Heating Costs: What You Pay in 2026
What a certified passive house costs to heat in 2026: the 15 kWh/m² demand, Eurostat energy prices, and per-model scenarios labeled as calculations.
Heat Recovery Ventilation: Cost, Benefits, Maintenance
MVHR explained with numbers: ~95% heat recovery, 99% of dust and allergens filtered, real costs and maintenance, and what's included per finish level.
Solar Panels for a Passive House: How Many kWp You Need
Size solar panels by dividing yearly electricity use by your site's yield per kWp. Compare batteries and BioBuilds kits for an all-electric passive house.
Zero-Emission Buildings 2030: What It Means for Your Home
From 2030 every new building in the EU must be zero-emission. What the recast EPBD requires, when it applies and what it means for a home you build now.
ETS2 Heating Costs From 2028: What Changes for Your Home
ETS2 adds a carbon cost to gas and heating oil from 2028. At €50 per tonne, gas costs about 1 cent more per kWh before VAT; heat pumps face no direct charge.
Air-to-Air or Air-to-Water Heat Pump for a New Home?
Air-to-air heat pumps suit very low heating demand and cooling; air-to-water suits underfloor heating and hot water. Compare both for a new low-energy home.
Electricity Prices in Europe 2026: Running an Electric Home
Household electricity prices across Europe in the first half of 2026, what 1,000 kWh costs in each country, and why low demand matters more than the tariff.
Central vs Decentralized MVHR for a New Home
Central MVHR suits a new airtight home; decentralized wall systems suit retrofits. Compare heat recovery, filtration, noise, installation and maintenance.
Energy Class of a House: EPC Ratings in Europe
A home's energy class uses its country's EPC method and thresholds. Germany, Austria, Romania, and Ireland use different scales, so letters are not comparable.
Off-Grid House in Europe: What It Really Takes
An off-grid house in Europe needs winter-sized solar, storage, backup, safe water and wastewater treatment. Low demand helps; local connection rules apply.
Healthy Living
Indoor air quality, mold physics, and what building materials do to the people living inside, with numbers instead of wellness claims.
How Healthy Is a Prefab Home? The Air Quality Numbers
98% organic materials, 99% of dust and allergens filtered, full air exchange every 2 hours: the measurable numbers behind a healthy prefab home.
What's in Your Walls: The 98% Organic Materials Breakdown
Every layer of the 35 cm wall, named: C24 FSC-certified frame, STEICO wood-fiber insulation, Agepan sheathing, Yakisugi or Lunawood. 98% organic by volume.
Mold in New Builds: Why It Happens and How to Prevent It
Why mold appears in new builds and which construction method removes the conditions: airtight envelope, MVHR humidity control, factory-dry build.
Ready to build your Passivhaus?
Configure your modular home online and get an instant price estimate. Our team is here to guide you through every step.
Configure your home