1. 2026 ranges by segment and quality
In PEM per built m², traditional construction, mid-cost area:
| Segment | Basic | Mid | High |
|---|---|---|---|
| Single-family home | €1,000 – 1,300/m² | €1,300 – 1,700/m² | €1,700 – 2,200/m² |
| Luxury single-family | €2,200/m² and above | ||
| Multifamily, above ground | €900 – 1,100/m² | €1,100 – 1,300/m² | €1,300 – 1,600/m² |
| Basement parking (per level) | €450 – 550/m² | €550 – 700/m² | Depending on water table and retaining works |
Three reading keys. First: multifamily shows lower ratios than single-family at equal quality through scale effects (shared façades and roofs, serialised services, repeated unit types), but height eventually penalises when structure, cores and site equipment grow faster than sellable area. Second: below-ground space is always rated separately; diluting the basement into the general ratio is the most frequent comparison error in residential work. Third: as a market reference, sector observatories placed the average Catalan multifamily building above €1,600/m² in execution cost in 2025, consistent with these PEM figures once overheads and industrial profit are added in a high-cost area.
2. From PEM to what is paid: a complete example
The chain of levels, applied to a 150 m² single-family home with a PEM of €1,500/m²:
| Item | Calculation | Amount |
|---|---|---|
| PEM | 150 × 1,500 | €225,000 |
| Overheads and industrial profit (19 %) | €42,750 | |
| Contract budget | €267,750 | |
| Professional fees | 10 – 12 % of PEM | ≈ €24,750 |
| Permit and ICIO tax | 3 – 5 % of PEM | ≈ €9,000 |
| Utility connections, charges and miscellaneous | ≈ €5,000 | |
| VAT (10 % housing) | ≈ €29,500 | |
| Total excluding land | ≈ €336,000 (≈ €2,240/m²) |
The relationship between PEM and total cost excluding land (around ×1.5) is the first check on any published figure: knowing which level it describes. In multifamily development, the chain also adds mandatory insurance (technical inspection and ten-year structural warranty for housing built for sale), marketing and financing costs, and the land; construction usually ends up between half and two thirds of the operation's total cost. The complete mechanism is developed in from PEM to total cost and the land variable in land cost impact.
3. The chapter breakdown
Orders of magnitude on the PEM for a standard multifamily building (single-family shifts weight towards envelope and finishes):
| Chapter | Usual weight |
|---|---|
| Earthworks and foundations | 5 – 12 % |
| Structure | 15 – 22 % |
| Façades and roofing | 12 – 18 % |
| Partitions and linings | 5 – 8 % |
| Building services | 15 – 22 % |
| Finishes and joinery | 20 – 28 % |
| Site works and miscellaneous | 3 – 8 % |
Two chapters concentrate risk management. Foundations have the highest variance: unfavourable ground, slopes or a high water table can double their weight, and the prior geotechnical survey is the project's best cost-to-risk investment. Finishes are the most elastic chapter: it is where quality decisions move the budget fastest, and where late changes cost the most.
4. Regional corrections and the size effect
Two systematic corrections operate on the mid-cost ranges:
| Factor | Indicative correction |
|---|---|
| Madrid and Barcelona (metropolitan) | +10 to +20 % |
| Balearics and prime coast | +10 to +25 % |
| Canary Islands | +5 to +15 % |
| Rural with difficult access | +5 to +15 % |
| Floor area: from 120 to 180 m² (single-family, same quality) | The unit ratio typically drops €100 – 150/m² |
The size effect has a simple explanation: kitchens, bathrooms, design fees and permits are largely insensitive to floor area, and spread better in larger homes. Conversely, small homes show the segment's highest unit ratios. The full geographic detail, with the method for carrying a ratio from one area to another, is in regional cost differences.
5. The four analyses in this branch
Construction cost of a multifamily residential building. The developer's reading: cost per dwelling with a worked calculation, treatment of below-ground space, height and compactness effects.
Self-build: the real cost of building your own home. The complete chain from land to first occupancy, the +25 to +40 % rule on the contractor's budget and the classic framing mistakes.
The impact of land on total cost. The land ratio calculation, ranges by area and the rule of thirds as a feasibility test.
6. The essentials
In residential work, the most expensive mistake is not getting the range wrong but the scope: comparing PEM with turnkey, above-ground with basements included, mid-cost area with a high-pressure capital. With a homogeneous scope, the 2026 ranges are stable: €1,000 to €1,700/m² PEM for single-family depending on quality, €900 to €1,300/m² for multifamily above ground, basements separately at €450 to €700/m², and a chain of associated costs adding 25 to 40 % before the land. The effective working method chains four decisions: range by segment and quality, regional correction, time correction through indices and verification of the budget level before any comparison.
Note: indicative ranges and examples for Spain in 2026, variable by region, project and market.