In short
Act 3-1951 empowers the Planning Board, with the advice of the Institute of Puerto Rican Culture, to determine which buildings and other structures are of historic or artistic value in Puerto Rico, and orders both to prepare and publish a list of them for general knowledge. The consequence that matters most to an owner is in that same Article 1: the provisions of Act 374-1949 apply to private buildings and other structures included in that list as if such building or structure stood in an old or historic zone established by the Board with the Institute’s advice. That is, being on the list imports the whole historic-zone permit regime onto a property that may lie far from any zone. For buildings belonging to the Government or the municipalities, the General Services Administration has custody and administration, may delegate them to another agency or to a municipality upon its acceptance, and adopts the rules of use. It also has charge of repair and conservation, and there the Act sets a firm limit: no substantial alteration shall be carried out without the approval of the Regulations and Permits Administration and the endorsement of the Institute of Puerto Rican Culture. The Act does not reproduce the list, sets no criteria for what historic value is, creates no procedure for an owner to object or ask to be removed, and creates no benefit, exemption or repair fund for private property.
What is it?
It is the Act that creates the official list of buildings and structures of historic or artistic value in Puerto Rico and states what appearing on it entails. For private property the consequence is a single big one: the permit rules of Act 374-1949 apply to it just as if it stood inside an old or historic zone. For Government or municipal property, the Act allocates custody, administration, repair and conservation, and requires approval and endorsement before any substantial alteration.
Who can do it?
It concerns anyone who owns a private building or structure included in the list prepared and published by the Planning Board and the Institute of Puerto Rican Culture, because from that moment their property is subject to Act 374-1949. It also concerns Government agencies and municipalities holding historic buildings in custody, and anyone about to take part in repairing or altering one. The Act sets no inclusion criteria, describes no procedure for notifying the owner and no mechanism to object or to be removed from the list; it determines who decides, not how.
Requirements
- The determination of which buildings and other structures are of historic or artistic value is made by the Planning Board with the advice of the Institute of Puerto Rican Culture (Article 1).Verified against the official source
- The provisions of Act 374-1949 apply to private buildings and structures included in the list as if they stood in an old or historic zone (Article 1).Verified against the official source
- No substantial alteration of a building or structure of historic or artistic value shall be carried out without the approval of the Regulations and Permits Administration and the endorsement of the Institute of Puerto Rican Culture (Article 3).Verified against the official source
- Delegating custody or administration of a Government historic building to another agency, instrumentality or municipality requires the prior acceptance of the recipient (Article 2).Verified against the official source
Documents you need
Cost
Step by step
Step 1: Understand what this list is and who makes it
Article 1 provides that the Planning Board, with the advice of the Institute of Puerto Rican Culture, shall determine the buildings and other structures of historic or artistic value in Puerto Rico, and that the Board and the Institute shall prepare and publish, for general knowledge, a list of such buildings and structures. The Act commissions the list; it does not reproduce it. It does not publish how many buildings it holds, nor which, nor where to consult it. Neither do we invent one nor guess an internet address where it would be.
Step 2: What changes if your private property is on the list
This is the heart of the Act for a private owner. That same Article 1 provides “that the provisions of Act No. 374, approved 14 May 1949, shall apply to private buildings and other structures included in the said list, as if such building or structure stood in an old or historic zone so established by the Planning Board, with the advice of the Institute of Puerto Rican Culture.” The consequence is complete: it does not matter that the building lies outside any demarcated zone; the list brings the same regime down on it. That means the Institute’s prior written recommendation before a construction or use permit is authorised, and a ruling on fittings, signs, architectural features and colour.
Step 3: If the building belongs to the Government or a municipality
Article 2 gives the General Services Administration custody and administration of the buildings and other structures of historic or artistic value belonging to the Government of Puerto Rico or to the municipalities. The Administrator may delegate that custody or administration to any agency or instrumentality of the Government or to the municipalities, but only upon the acceptance of the recipient: the delegation is not imposed. The Administrator, or the body delegated to, adopts the rules it deems convenient for the use of such buildings and structures. None of this reaches listed private property, which is governed by the previous step.
Step 4: Before any substantial alteration: approval and endorsement
Article 3 puts the General Services Administration in charge of the repair and conservation of the buildings and other structures of historic or artistic value, and says that in performing this function the Planning Board and the Institute of Puerto Rican Culture may be consulted. That “may” is permissive. What follows is not: “provided, that no substantial alteration of such buildings or structures shall be carried out without the approval of the Regulations and Permits Administration and the endorsement of the Institute of Puerto Rican Culture.” Those are two different things and both are required, an approval and an endorsement, from two different bodies. The Act does not define what counts as a “substantial alteration”.
Step 5: What the Act does not give you
It is worth saying plainly because it is what people look for most and it is not there. Act 3-1951 creates no tax exemption, subsidy, credit or repair fund for the private owner of a listed building: the repair and conservation funded by Article 3 covers buildings belonging to the Government or the municipalities. Nor does it create a procedure for the owner to be notified before their property is included, to object, to ask to be excluded, or to have the determination reviewed. And it sets no criteria: Article 1 says who determines historic or artistic value, not by what standard. If you are looking for any of those things, they do not come from this Act and we will not invent them.
Step 6: Where the Act comes from and what it repealed
The last articles are transitional. Article 4 transfers to the Department of Public Works, for use in connection with the functions this Act orders it, the records, property and unspent balances of appropriations, items or other funds of the Historic Values Conservation Board created by Act No. 27 of 23 April 1930, without affecting the transfers made under Reorganisation Plan No. 6 of 1950. Article 5 repeals that Act No. 27 of 1930 and Section 5 of Act No. 75 of 25 April 1949. Article 6 provides that the Act, being urgent and necessary in character, took effect immediately. The OGP compilation identifies two amending acts incorporated: Act No. 48 of 10 June 1953 and Act No. 8 of 18 July 1975.
Where to do it
The determination and the list come from the Planning Board with the advice of the Institute of Puerto Rican Culture. Custody, administration, repair and conservation of historic buildings belonging to the Government or the municipalities sit with the General Services Administration. The endorsement for a substantial alteration is given by the Institute of Puerto Rican Culture, and the approval by the permit agency Article 3 names as the Regulations and Permits Administration, which is the 1951 name. The Act publishes no addresses, forms, telephones or portals, and we do not guess government internet addresses.
How long it takes
What to do if something goes wrong
What we did not read and therefore do not publish: Act 374-1949, whose provisions Article 1 makes applicable to listed private buildings — we have a separate guide to that Act, written from its own text; the two amending acts the compilation identifies, Act No. 48 of 10 June 1953 and Act No. 8 of 18 July 1975; Reorganisation Plan No. 6 of 1950; and Act No. 75 of 25 April 1949, of which Section 5 was repealed. Of those we report only what this text says. A note on agency names: the 1951 text names the Regulations and Permits Administration in Article 3 and the Department of Public Works in Article 4, and this compilation annotates no substitution, unlike the Act 374-1949 compilation, which does annotate that the Regulations and Permits Administration was substituted by the Permit Management Office created by Act 161-2009. We report the names the text uses and warn that they are the 1951 ones; we do not guess the successor where the compiler did not. Four gaps, said clearly. There is no list published inside the Act. There are no criteria for what constitutes historic or artistic value. There is no procedure of notice, objection, removal or review for the owner. And there is no charge or term of any kind, which is why cost and time are unverified.
Common mistakes
- Believing being on the list is merely honorific: Article 1 applies the whole Act 374-1949 permit regime to listed private property.
- Thinking the Act only affects buildings inside Old San Juan or a demarcated zone: the list reaches buildings outside any zone.
- Looking for the list inside the Act: the Act orders it prepared and published, it does not reproduce it.
- Assuming there are legal criteria for what historic value is: Article 1 says who determines, not by what standard.
- Expecting a tax exemption or a repair fund for being listed: the Act creates none for private property.
- Believing the General Services Administration also repairs private buildings: Articles 2 and 3 speak of those belonging to the Government or the municipalities.
- Obtaining only the Institute of Culture’s endorsement for a substantial alteration: Article 3 also requires the permit agency’s approval.
- Taking consultation with the Planning Board as mandatory in a repair: Article 3 says it “may be consulted”, and only the approval and the endorsement are mandatory.
- Assuming a municipality is left with custody of a historic building by the Administrator’s unilateral decision: Article 2 requires the municipality’s prior acceptance.
Frequently asked questions
What happens if my private house appears on the list?
Article 1 provides that the provisions of Act 374-1949 apply to private buildings and structures included in the list as if they stood in an old or historic zone. In practice, your property becomes subject to the same historic-zone permit regime even if it lies outside any zone.
Where do I consult the list?
The Act orders the Planning Board and the Institute of Puerto Rican Culture to prepare and publish it for general knowledge, but does not reproduce it or say where it is published. We do not guess government internet addresses; what the Act does establish is who makes it, and those two bodies are whom to ask.
Can I ask for my property to be taken off the list?
This Act creates no such procedure. It provides no prior notice to the owner, no objection, no removal and no review of the determination. We say what the Act lacks rather than filling the gap.
Is there any help to repair a private historic building?
Not under this Act. Articles 2 and 3 place custody, administration, repair and conservation with the General Services Administration only for buildings belonging to the Government of Puerto Rico or the municipalities. Act 3-1951 creates no exemption, subsidy or fund for private property.
What is needed to substantially alter a historic building?
Article 3 requires two things and both of them: the approval of the permit agency — which the 1951 text names the Regulations and Permits Administration — and the endorsement of the Institute of Puerto Rican Culture. The Act does not define what counts as a substantial alteration.
Who decides whether a building is of historic value?
The Planning Board, with the advice of the Institute of Puerto Rican Culture, under Article 1. The Act does not set the standard by which that determination is made.
Official sources
These are the government pages this guide is based on.
- Instituto de Cultura Puertorriqueña (ICP)
ICP
bvirtualogp.pr.gov
Last verified
August 30, 2026
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