Cost of building a small prefabricated house (2025)

The construction cost of small prefabricated houses is significantly affected by the area, material grade, decoration standard and region, with the total price of a 100m2 house being around 100-250,000 RMB. It is recommended to prioritize the all-inclusive service (1500-2000RMB/㎡), take into account the quality and cost-effectiveness, and pay attention to the qualification of the construction team and the environmental certification of the materials.

1. Basic cost range

Economy type

Unit price: 1000-1200 yuan/㎡ (only the main structure + basic decoration)

Total price of 100 square meters: about 100-120,000 yuan, including light steel keel, thermal insulation materials, simple doors and windows and other basic configuration.

Comfortable type

Unit price: 1,200-1,500 RMB/㎡ (including external decoration, doors and windows and medium internal decoration)

Total price for 100㎡: about 120,000-150,000 RMB, upgraded to broken-bridge aluminum windows, insulating glass and rock wool insulation.

Deluxe type

Unit price: 1500-2500 RMB/㎡ (high-end building materials + fine decoration)

Total price of 100 ㎡: RMB 150-250,000, including metal carving board exterior wall, intelligent home system and customized design.

2. Cost composition breakdown

Material costs (accounting for about 60-70%)

Light steel keel: 3-5 tons, unit price 3,000-5,000 yuan/ton, total 0.9-2.5 million yuan.

Insulation material: extruded plastic board/rock wool, about 10-20,000 RMB for 100 square meters.

Exterior materials: cement fiber board (80 yuan / ㎡) or metal carving board (200 yuan / ㎡), 100 ㎡ about 0.8-20,000 yuan.

Construction cost (accounting for about 25-35%)

Foundation construction: foundation treatment and pouring, about 20,000-30,000 RMB for 100㎡.

Main installation: mechanized assembly, about 30,000-50,000 yuan for 100㎡.

Decoration cost: about 20,000-30,000 RMB for simple interior decoration, up to 80,000 RMB or more for fine decoration.

Hidden cost

Design fee: 5,000-20,000 yuan (including structure, water and electricity and decoration design).

Transportation fee: 10%-15% increase in remote areas, about 0.5-15,000 yuan.

3. Regional and construction differences

Regional price fluctuation

Coastal/developed areas: supply chain is mature, unit price is 5%-10% lower (e.g., 1500 yuan / square meter can be completed all-inclusive).

Remote areas: 10%-15% increase in transportation costs, the construction cycle is extended by 10-20 days.

Comparison of construction cycle

100 square meters house: factory prefabrication 1-2 weeks, on-site installation completed within 1 month, the total cycle of about 6-8 weeks.

4. Cost-effective advantage

Long-term cost savings

Maintenance cost: only 0.1-0.3 million yuan per year (about 0.5 million yuan/year for traditional building).

Energy-saving benefits: insulation design reduces air conditioning energy consumption by 40%, saving about 2,000 yuan in annual electricity costs.

Policy and environmental value

Recyclable rate is over 80%, and the land can be directly replanted after dismantling.

5. Reduce the cost of light steel prefabricated houses

Standardized house design

Adopting standardized house type with prefabrication rate ≥80% reduces the demand for shaped components and lowers the loss rate of keel cutting to less than 3%.

Unify the size of door and window openings (e.g. 1500mm×2100mm standard window), realizing a 10%-15% reduction in bulk purchase cost.

Accurate structural calculation

Optimize the spacing of lightweight steel keels (550-600mm recommended) through BIM software to reduce steel consumption by about 8% while maintaining structural load-bearing capacity.

Adopt C-beam and U-beam combined frame to replace the traditional full keel structure, reducing steel consumption by 12%.

Foundation optimization scheme

Adopting strip foundation instead of pile foundation, the foundation cost in the area with good geological conditions is reduced from 30,000 yuan/100 square meters to 15,000 yuan68.

Ground pre-embedded pipelines are constructed synchronously with light steel keel, reducing the cost of secondary trenching by about RMB 0.8 million/100㎡.