Opinion by
Mr. Justice Sadler,Anthony Zane owned a tract of ground in the City of Philadelphia, through which Park Avenue ran. He laid it out in building lots, and on each side of the street erected fifteen dwellings, all having three stories and a front porch. The parties to the present proceeding became owners of certain of these houses through conveyances which contain the following reservation: “That no building or any porch in front of the same erected upon the lot of ground above described shall extend eastward further than the lines established for the same by the building and porch now erected thereon, to wit: The easternmost line of the building shall be nineteen feet and the easternmost line of the porch shall be eleven feet westward from the west side of Park Avenue, as at present opened of the width of fifty feet.” The defendant acquired Nos. 2322 and 2324. To both dwellings were attached substantial one-story porches, placed upon solid foundations, with wooden columns supporting the roofs. This construction is similar to that found in the other houses built by Zane. In some instances, above the first floor there were projections from the wall of the building in the form of bay windows on the second floor, and enclosed balconies on the third.
The defendant decided to erect a new porch extending to the roof, and available in connection with each of the three floors. For this purpose, the side walls of the building were extended toward Park Avenue. This action was restrained, on application, and the permanent addition removed. New plans were subsequently approved by the building department of the city, and an open porch, three stories in height, extending no farther east than the line of the original structure, was designed. Floors were provided, supported by three pillars, — in lieu of the four originally in place, — and having a concrete balustrade of a height of three feet on each of the landings. Again, the equity court was applied to, and *299the result was a restraining order, which is the basis of this appeal.
The learned chancellor found that the proposed porch would not extend farther east than the line fixed in the building restriction, and that the porches on each floor would not obstruct the light, air and view on any floor to a greater extent than was done by the one-story porch on the first floor. He also found, however, that the work would destroy the uniformity of the houses and interfere with “the light, air and prospect” of the properties on Park Avenue erected by Zane, thus diminishing their value.
The right of the plaintiff to equitable relief depends upon the interpretation to be given the building restriction found in the various conveyances. It is clear, from the wording of the reservation, no restraint was placed on the height of the porches to be built by the grantees; the only limitation is to the nearness of approach to Park Avenue. To hold that the former prohibition was intended, it is necessary to draw inferences from the facts as they appear to have existed at the time of the transfers by Zane. Though the finding of the chancellor as to this is entitled to great weight, it is still the duty of the appellate court to determine whether the result reached was based on a proper understanding of the facts proven, and a correct application of the legal principles: McConville v. Ingham, 268 Pa. 507.
It must be borne in mind that restraining covenants are strictly construed against the person seeking to enforce them, and all doubts resolved in favor of natural rights and the privilege of the owner to exercise untrammelled control of his own land: 18 C. J. 387; Johnson v. Jones, 244 Pa. 387. “Nothing will be regarded as a violation of [a reservation] that is not in plain disregard of its express words. There are no implied rights arising from it which courts will recognize, and covenants like it are not to be extended by implication”: Crofton v. St. Clement’s Church, 208 Pa. 209. True, the *300language used is to be construed in light of the facts showing the situation in which the parties stood, the necessities for which théy would naturally provide, the conveniences they would probably seek to secure, and the circumstances and relations of the property as to which they have negotiated (Rabinowitz v. Rosen, 269 Pa. 482; Murphy v. Ahlberg, 252 Pa. 267); nevertheless, the limitations fixed by the parties themselves control, and new restrictions are not to be added by implication, where the provisions made are clear and unambiguous: Meigs v. Lewis, 164 Pa. 597.
In the present case, a porch was contemplated. Its point of approach to the street was clearly defined, but no restraint as to height appears. If such a prohibition is to be asserted, it must be implied from the circumstances, apparent at the time of making the contract, showing that intention. We are unable, here, to discover facts from which this conclusion can properly be drawn, unless it be held that the structure proposed is in effect a building, the erection of which will result in moving the “building line” to the eastward in violation of the restriction. If the porches were enclosed so as to create rooms, such a finding would be justified (Law v. Weeter, 68 Pa. Superior Ct. 23); and the same can be said if the attempt was to build the structure within a certain distance of the highway, an act prohibited by a restriction designed to keep free and open a certain designated width: Ogontz Land & Improvement Co. v. Johnson, 168 Pa. 178. Here, the plans show the erection to be as open on all floors as was the former one on the first floor, and, in fact, to require less pillar support than before.
Doubtless the “light, air and prospect” of the adjoining dwellings will be affected to some extent by the construction, but the restriction failed to cover this contingency, as in Murphy v. Ahlberg, supra; nor did it provide that the fronts of the houses should be uniform. It is to be noted that this condition did not exist at the time of the original conveyance, for, in some of the *301houses hay windows were attached to the second story, and in others narrow projecting balconies appear at the third. Whether so or not, the covenant does not forbid, in express words, structures having this effect, and we are without authority to add such stipulations by implication.
For the reasons stated, the decree of the court below must be set aside, and the injunction heretofore granted dissolved. If at any time an effort should be made, by enclosure, to convert the proposed porches into rooms, or to make other alterations to justify the conclusion that the building line has been, in effect, moved to a point within the prohibited distance, relief can be obtained by appropriate proceedings.
The decree is reversed, and the bill is dismissed at the costs of the appellee.