Statements of successfull STO-makers
Our common target is to tackle all the challenges and take advantage of the opportunities to achieve a real sustainability, both for the municipal administration and the neighbors of our municipality. In this point, Solar Thermal Energy is a very important potential for our municipality. The Solar Thermal Obligation will contribute to regulate, guide and enhance the development of these systems, increasing the use of energy coming from renewable resources and reducing CO2 emissions.

Mrs. Adela Martínez Cachá - Deputy Mayor for Environment and Urban Quality at the City Council of Murcia (SP). Vice-President of the Local Agency for Energy and Climate Change  of Murcia.

Today, energy is a part of everyday life! As leaders in our community, we have the obligation to set an example of good practice in the areas of energy saving and renewable energy use, so that citizens would acknowledge the importance of each gesture intended to contribute to the health of the planet.

Eng. Lucian ILIESCU – Mayor of Giurgiu Municipality (RO)
“Solar thermal has enormous potential and low costs. Our challenge in Lazio is to convince people of the advantages deriving from its use.”

Mr. Filiberto Zaratti - Regional Minister for Environment and Cooperation among Peoples, Lazio Region (IT)

Solar energy will be
the “sun of energy”!

Professor Eduardo de Oliveira Fernandes - Secretary of State for Environment (Portuguese Government, 1984-1985), Secretary of State to the Minister of Economy for Energy and Innovation (Portuguese Government, 2001-2002), former Chairman of the Commission for Buildings Thermal Regulations at the CSOPT  (Portuguese Ministry of Public Works, 2002-2006)

Our justifiably ambitious climate protection goals are reachable. However, this needs active combatants. With the provided regulations we found a passable way for on one hand making an effective contribution to reducing CO2-emmissions and on the other hand not overburden the single citizen. People do follow, because they feel, that we have to act for protecting the climate.

Tanja Gönner - Minister for the Environment of the State of Baden-Württemberg (DE)

STO Database

Detail View:Regional obligation in Lazio for solar thermal systems and water saving in buildings.

Region Lazio

Regione Lazio
Viale del Tintoretto, 432
00142 Roma (Italia)
Phone +39 0651689372
Fax +39 06510779293


The herein described Law no. 15 foresees the mandatory use of solar thermal energy and the rational use of water in buildings. Its scope includes both new and under refurbishment buildings.
The law itself does not go into details regarding specific measures to be applied, leaving to the Municipalities the duty to apply the law in details.
The text of the law could be downloaded from:

Ordinance Facts
Ordinance titleRegional obligation in Lazio for solar thermal systems and water saving in buildings.
Type of ordinancesolar thermal ordinance
Starting dateThis law was published on November, 8th 2004.
Geographical areaRegion Lazio
No. of inhabitants, area5.5 millions; 17,000 km2

Building scope: both new and refurbished, both public and private; exemptions: in general, the historical parts of cities are exempted from the law; then, the Municipalities should also take into account their specific local landscape needs, historical constraints and environment.

Technology priorities

Solar thermal.

Size of the solar heating system requiredNot specified.
Alternative measuresNot foreseen.
Executing authorityRegion Lazio and its Municipalities.
Execution mechanism

No detailed management of the regulation and of its implementation is foreseen in the text of the law, expect for the fact that the Municipalities will be in charge of applying the law and also of checking the completeness of the presented building projects with respect to the rules established.

Development and Implementation

At the time of issuing the law, the Municipality of Carugate and other small towns in the Province of Milano had already implemented STOs and also the case of Barcelona “Solar Ordinance” was well known in Italy.
However, the main aim of this law was a political one: solar energy is quite well perceived by the final user and, therefore, promoting solar energy is a popular political measure.


No quantifiable objectives are included in this law, since this was the task of the Municipalities.


This STO is fully based on a local initiative, taken by a single politician, Mr. Celori, a representant of the right wing Regional Government. The Municipalities should apply the law details.
The law includes the obligation of solar thermal collectors and water savings measures. Passive solar and insulation measures benefit of a special rebate on the construction costs.


This law was published in November 2004 and the Municipalities had 6 months time to implement it.
So far, only a few Municipalities implemented the law.
No closing is foreseen for this regulation.

Quality schemes productno
Quality schemes installationno
Quality schemes otherno
Flanking measures

No flanking measures are foreseen, expect for what is stated in art. 4: Region Lazio, in collaboration with the Municipalities, should diffuse information about the initiatives undertaken.


The Municipalities are in charge of checking that the applications fulfil the requirements. This check should be done before releasing the building permission.

Sanctioning feesNot foreseen.
Costs for implementing

The cost on the side of Region was quite low, since the text of the law has not required a remarkable investment of cost and time. The situation is now slightly changing, given a new committment by Region Lazio. The cost for the Municipalities could be very high, since they have to develop a management scheme for the application of this law, without having the needed technical skill.

Monitoring and Results

No monitoring of the Municipalities which applied the Law or of the global results was planned by the Region.

Quantitative results

At the moment, the results are quite low.
Region Lazio did not make an assessment of the potential impact of this regulation on the Italian market for solar thermal systems.

Costs borne by the enduserNot available
Effects on other sectors

No effects can be assumed by the issuing of this law.


Only the issuing of the law was widely communicated through newspapers and TVs, but there was a complete lack of communication towards the Municipalities.

Future outlook

After Rome, 3 more Municipalties introduced a STO and 2 more are on the way.

Lessons learned
Barriers faced and overcome

The law was quite weak, so no major barriers have been faced for issuing it. 

Success factors

The ordinance in the City of Rome (see relative case study).

Potential for improvement

- Law forced for political purposes
- Lack of communication and pressure
- No sanctioning fees
- No technical support to Municipalities


Municipalities should transpose the law into their building regulations. The enforcement procedures should be organised at regional level.

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