How Much Does a Single-Family Home Project Cost?
The average cost of a single-family home project can vary depending on the Budget of Execution and the fees applied by the architect. For a 120 m² house with average qualities and a budget of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies 7% and around 12,000 € if raised to 10%.
The amounts are indicative and come from the original imported guide. The final budget depends on scope, materials, and previous condition of the space.
Service Levels and Pricing
Compare different single-family home project options based on your budget and design needs.
Basic
Simplified project for single-family homes up to 100 m² with standard construction quality. Includes essential technical documentation without additional studies.
Standard
Complete project for homes of 100-150 m² with mid-range quality and BEC of 100,000-150,000 €. The most recommended option that includes all studies necessary for licensing and execution.
Premium
Comprehensive project for homes over 150 m² with superior quality, personalized design, and advanced studies. Includes construction supervision and specialist coordination.
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How much does it cost to draft a single-family home project?
The price of a single-family home project varies depending on the PEM and the architect's fees. For example, a 120 m² house with a PEM of 120,000 € and average finishes would cost 8,400 € if the professional applies a 7%.
Single-family home project 70 m²
Single-family home project 80 m²
Single-family home project 100 m²
Single-family home project 120 m²
Single-family home project 150 m²
Single-family home project 200 m²
Stages in presenting a housing project with Reformia
The average cost of a single-family home project can vary depending on the Budget of Material Execution and the fees applied by the architect. In the case of a 120 m² house with average finishes and a PEM of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies a 7% and around 12,000 € if they raise it to 10%.
1. Hiring an architect or architecture firm
It should be noted that only accredited professionals can be responsible for drafting a single-family home project. Before making a choice, it is advisable to review the projects of several firms or architects, seek references, and request quotes. Once the selection is made, a service agreement must be signed.
2. Delivery of the preliminary design to the client
Based on the client's ideas, a first sketch of the work is prepared. This phase is important because before it is drafted, the viability of the project must be checked by investigating the characteristics of the land and verifying that there are no obstacles due to the town's urban planning regulations. Once drafted, it is shown to the client for approval or introduction of corrections if necessary.
3. Basic project and building permit
The basic project develops with greater accuracy everything outlined in the preliminary design. Its submission to the town hall is essential for it to grant the building permit, although it does not require it to be certified. If the competent authority rejects it for urban planning reasons or because it does not comply with the ordinances, it will be necessary to make the necessary corrections to resubmit it.
The average cost of a single-family home project can vary depending on the Budget of Material Execution and the fees applied by the architect. In the case of a 120 m² house with average finishes and a PEM of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies a 7% and around 12,000 € if they raise it to 10%.
What is usually included in a quote
Each professional may structure quotes differently, but most project budgets follow this logic.
Typically included
Often not included
Stages in presenting a housing project
The average cost of a single-family home project can vary depending on the Budget of Material Execution and the fees applied by the architect. In the case of a 120 m² house with average finishes and a PEM of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies a 7% and around 12,000 € if they raise it to 10%.
1. Hiring an architect or architecture firm
It should be noted that only accredited professionals can be responsible for drafting a single-family home project. Before making a choice, it is advisable to review the projects of several firms or architects, seek references, and request quotes. Once the selection is made, a service agreement must be signed.
2. Delivery of the preliminary design to the client
Based on the client's ideas, a first sketch of the work is prepared. This phase is important because before it is drafted, the viability of the project must be checked by investigating the characteristics of the land and verifying that there are no obstacles due to the town's urban planning regulations. Once drafted, it is shown to the client for approval or introduction of corrections if necessary.
3. Basic project and building permit
The basic project develops with greater accuracy everything outlined in the preliminary design. Its submission to the town hall is essential for it to grant the building permit, although it does not require it to be certified. If the competent authority rejects it for urban planning reasons or because it does not comply with the ordinances, it will be necessary to make the necessary corrections to resubmit it.
4. Executive project
It is the final phase of a home project, the document in which all technical and constructive aspects are detailed precisely. It must also be submitted to the town hall, but this time it must be certified. In principle, it is necessary to start the works; however, if the granting of the building permit takes more than three months, work could begin. However, this does not imply that the permit has been granted and the competent authority could deny it even with the work already started.
What can change your final price
Even similar projects can end with different budgets. These are the factors that most often push costs up or down.
Estimated Construction Cost (PEM)
The total project cost depends directly on the PEM, which includes materials and labor. A 120 m² project with standard finishes (1.000 €/m²) will have a PEM of 120.000 €, while higher quality finishes can reach 1.500-2.000 €/m².
Architect's fee percentage
Architects typically apply between 7% and 10% of the PEM as professional fees. On a 120.000 € project, this represents a difference of 3.600 € between applying 7% or 10%.
Technical and regulatory complexity
Projects in consolidated urban areas with plot limitations or sustainability requirements (energy certificate, accessibility) increase design time and calculations, raising professional fees accordingly.
Project scope and number of disciplines
A basic project includes architecture only, but complete projects require structural calculations, building systems (electrical, plumbing, HVAC) and technical engineering, which can raise costs by an additional 1.000-3.000 €.
How much does it cost to draft a single-family home project?: explanation
The average cost of a single-family home project can vary depending on the Budget of Material Execution and the fees applied by the architect. In the case of a 120 m² house with average finishes and a PEM of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies a 7% and around 12,000 € if they raise it to 10%.
In the following table you can see the prices of different house projects based on square meters. These are approximate budgets, since professionals can apply fees between 7% and 12% of the Project Execution Budget.
How much does a single-family home project cost?
The average cost of a single-family home project can vary depending on the Budget of Material Execution and the fees applied by the architect. In the case of a 120 m² house with average finishes and a PEM of 120,000 € (1,000 €/m²) it would range between 8,400 € if the professional applies a 7% and around 12,000 € if they raise it to 10%.
A housing project is a set of documents that define the home's design and all construction elements, as well as an execution budget. Since it is a residential building, it must be drafted by an architect, as stipulated by the Building Regulation Law. The project has several phases:
Factors affecting the price
Drafting a single-family home project has a variable cost that depends on many different issues:
- Preliminary design: it is a first approach to the work. It shows the essential characteristics of the property. It typically consists of different documents, including a justification report of the general solutions, unscaled plans, and a first draft of the budget.
- Basic project: it defines the characteristics of the house in more concrete terms. In fact, it is the essential document that must be submitted to the town hall to obtain a building permit. It must include a report of the technical and constructive characteristics, justification of the adopted solutions, scaled plans, and a budget with a global estimate for each section.
- Executive project: it completes the basic project by setting out details and specifications of materials, construction systems, equipment, etc. It will guide the development of the works and must include a report on foundations and structure with plans, a report on utilities, diagrams and sizing of installations, specifications sheet, and an itemized budget. It must be certified and presented to the town hall because without its approval, work cannot begin. It can be submitted jointly with the basic project.
- Architect's fees: they are usually calculated based on the Budget of Material Execution (PEM). Each professional is free to apply the percentage they consider appropriate, which is why the range is highly variable, ranging from 4% to 12% of the PEM, although most apply around 8% - 10%.
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Frequently Asked Questions
How much does it cost to draw up a single-family home project?
The cost depends mainly on the Construction Budget (PEM) and the architect's fee percentage. For a 120 m² single-family home with average finishes and a PEM of 120,000 €, fees typically range from 8,400 € (7%) to 12,000 € (10%). Most architects in Spain charge between 7% and 10% of the total construction budget.
What is included in a single-family home project?
The technical project includes descriptive reports, distribution and structural plans, building systems (electrical, water, sewage), energy efficiency calculations, and a detailed construction budget. It also covers the documentation needed to apply for municipal building permits and compliance with the Technical Building Code.
How long does it take to draw up a single-family home project?
The average timeframe ranges from 4 to 8 weeks, depending on project complexity and the architect's availability. Simple detached home projects can be completed in 4-5 weeks, while more complex projects with difficult topography or special requirements may take 8-10 weeks.
How do I choose the right architect for my home project?
Verify they are registered with the Official Association of Architects in your autonomous community and request references from similar previous projects. Compare quotes from at least 3 professionals, but don't base your decision on price alone: evaluate their experience, listening skills, and knowledge of local regulations. A cheaper architect doesn't always guarantee better results.
Do I need a formal project to build a single-family home?
Yes, you must have a complete technical project drawn up by a registered architect to obtain a municipal building permit in Spain. Without this document, the city council will not authorize construction to begin, and you could face significant administrative penalties.
Got more questions? Contact us!
Got more questions? Contact us!
Frequently Asked Questions
How much does it cost to draw up a single-family home project?
The cost depends mainly on the Construction Budget (PEM) and the architect's fee percentage. For a 120 m² single-family home with average finishes and a PEM of 120,000 €, fees typically range from 8,400 € (7%) to 12,000 € (10%). Most architects in Spain charge between 7% and 10% of the total construction budget.
What is included in a single-family home project?
The technical project includes descriptive reports, distribution and structural plans, building systems (electrical, water, sewage), energy efficiency calculations, and a detailed construction budget. It also covers the documentation needed to apply for municipal building permits and compliance with the Technical Building Code.
How long does it take to draw up a single-family home project?
The average timeframe ranges from 4 to 8 weeks, depending on project complexity and the architect's availability. Simple detached home projects can be completed in 4-5 weeks, while more complex projects with difficult topography or special requirements may take 8-10 weeks.
How do I choose the right architect for my home project?
Verify they are registered with the Official Association of Architects in your autonomous community and request references from similar previous projects. Compare quotes from at least 3 professionals, but don't base your decision on price alone: evaluate their experience, listening skills, and knowledge of local regulations. A cheaper architect doesn't always guarantee better results.
Do I need a formal project to build a single-family home?
Yes, you must have a complete technical project drawn up by a registered architect to obtain a municipal building permit in Spain. Without this document, the city council will not authorize construction to begin, and you could face significant administrative penalties.