-We deal here with 2 cases consolidated on appeal wherein residents in the immediate vicinity of a trailer camp sought injunctive relief from an expansion of said trailer camp. In Cook v. Bandeen, various neighbors sought to restrain- the expansion on grounds of- violation of the zoning ordinance of the city of Mt. Pleasant. In Brownson v. Bandeen, homeowners who had purchased their lots from the Bandeens sought injunctive relief from the expansion on their claim that defendants were thereby violating existing reciprocal negative easements. The circuit judge who heard both matters granted injunctive relief in both proceedings.
Defendants Kenneth and Beatrice Bandeen purchased an unsubdivided tract of land lying north and east of the intersection of US-27 and High street *331 in 1927. The original tract extended 20 rods north and 48 rods east of said intersection.
Prior to the Bandeen purchase, the city of Mt. Pleasant had adopted a zoning ordinance, # 208, effective September 30, 1926. This ordinance placed all of defendants’ property, except that immediately adjacent to US-27, in a residential classification whose enumerated uses did not include trailer camps. Subsequently — and prior to the expansion here complained of — said ordinance was amended by ordinance # 290, effective August 28, 1947, which increased the business zoning of defendants’ property to a depth of 150 feet paralleling US-27. The business classification of this ordinance allowed the construction of trailer camps.
Starting in 1929, and continuing down to 1955, defendant’s Bandeen moved to the property in question and began to develop its western portion along US-27. A store building was built on the corner in 1940 and 8 or 9 cabins were constructed. Prior to 1955 some of the cabins had been removed and trailer sites prepared, and trailers were placed thereon. The area thus employed appears to have extended to a depth of approximately 264 feet from US-27, as . shown on plaintiff’s exhibit 1, or to the western boundary of Anna street if extended south through defendants’ property to High street.
In March of 1955 defendant Kenneth Bandeen prepared a plan for expansion of the trailer park farther to the east. This plan involved the construction. of a trailer camp utility building within the area west of the west line of Anna street extended (approximately 264 feet from US-27). But it also involved the use of an L-shaped parcel extending at its greatest depth from US-27 an additional 183 feet farther to the east, beyond the west line of Anna street extended. It was the proposed location on this property of 15 additional trailers, plus the *332 construction of a trailer camp office thereon, which apparently precipitated this litigation.
The construction of the utility building was started in May of 1955 (after receipt of a building permit on May 23, 1955), and completed June 14, 1955. Subsequently, in July, preparation of the additional trailer sites was begun, and protests from neighbors and the city of Mt. Pleasant followed promptly.
The circuit judge filed a lengthy and careful opinion analyzing the provisions of the zoning. ordinances. Contrary to the positions urged by defendants before us, he held that the residential classification of the zoning ordinance did not permit a trailer as a residential “building” (see
Michaels
v.
Township Committee of Pemberton Township, Burlington County,
3 NJ Super 523 [
As to all of these well-reasoned conclusions, we agree.
The circuit judge also passed on the reasonableness in a constitutional sense of the zoning ordinance as it applied to defendants’ property. He held that due to existing business uses along US-27 and across High street it was unreasonable for the city to zone for residential use only that portion of defendants’ property lying west of the west line of Anna street extended. Beyond that line to the east, he held the residential zoning classification reasonable, and enjoined the use of the disputed 183 feet for trailer camp purposes.
No cross appeal was taken by appellees. Hence we must determine only whether or not the residential classification of the zoning ordinance was reasonable in a constitutional sense as it applies to the *333 183 feet of defendants’ property lying east of the extended west line of Anna street.
The circuit judge pointed out in his opinion that this area was surrounded on 3 sides by areas zoned and developed for residences.. He said further:
“There must be a cutting-off line, and even though the property may be worth more to the defendants as trailer park property rather than residential, they must forfeit such benefit to themselves individually, for the advantage and welfare of the people living-in the area who are entitled to residential classification of their property.”
Generally, we regard the application of zoning-classifications as a legislative function to be exercised by the legislative body of the city concerned. The courts do not sit to function as a super zoning-board.
Brae Burn, Inc.,
v.
City of Bloomfield Hills,
Nothing is presented in this record which would justify our holding- the zoning ordinance unconstitutional in prohibiting- a trailer camp in the disputed area of defendants’ property east of the west line of Anna street extended.
Roberts
v.
City of Three Rivers,
Nor do we feel that there is merit to appellants’ argument as to laches, or nonconforming use, as to the disputed area. Plaintiffs protested promptly when defendants’ intentions as to this area became clear, and defendants proceeded to violate the ordinance at their peril. No facts point to nonconforming use of this area prior to the zoning ordinances in question. Nor do we think that the issuance of the building permit for the utility building constituted an interpretation of the zoning- ordinance as claimed by appellants. Nor, if it did, would we believe such an erroneous interpretation binding.
Fass
v.
City of Highland Park,
*334 As to Cook v. Bandeen, we affirm. Costs to appellees.
"We likewise agree with the chancellor’s view of the reciprocal negative easement problem presented by Brownson v. Bandeen.
Without detailed statement of the various transactions, it may be pointed out that the Bandeens sold various parcels of their original tract to plaintiffs who subsequently built homes thereon. Several of these deeds carried a restriction as follows:
“It is understood and agreed between the first and second parties hereto that the property above described is to be used for dwelling purposes only and any dwelling house erected thereon is to cost not less than $5,000.”
The deeds also, made use of a description based on a certain plat of Bandeen’s subdivision which defendant Kenneth Bandeen had had prepared, but which was never subsequently recorded. One lot owned at the time of this proceeding by the defendants and intended for use in the trailer park expansion had, however, been deeded without restriction to William T. Bandeen, a brother of Kenneth Ban-deen, prior to the grant of the restricted deeds, and subsequent to the granting of the restricted deeds had been reconveyed to defendants.
The chancellor found defendants bound by reciprocal negative easements as to the 2 blocks described in the unrecorded plat lying east of Anna street. He said:
“In determining the second case which is the reciprocal negative easement case, the court realizes that restrictions are placed in deeds for a purpose. There is no question but what the defendants when they inserted the restrictions in the deeds covering the 3 lots in block 2 of the unrecorded plat of Ban-deen’s subdivision they desired some benefit to re-;
*335
suit. Now, there was no need for them to insert the restriction for the benefit of the grantee unless someone else building in the same block would likewise be restricted, for it is easy to follow the grantee could protect himself as to his own lot, or lots, by building thereon a proper home or house. We then must come to the conclusion that it is put in the deeds for the purpose of protecting the balance of the property owned by the defendants so that the property will be developed in a manner to the liking and wishes of the defendants. There is no question but what the restrictions were an inducement to those purchasing lots. They all followed the pattern and requirements with the exception of William T. Bandeen and his wife, who built a duplex on one of the lots. This violation evidently wasn’t deemed serious by the other owners in the area because no suit followed. However,, this would not preclude the other owners of lots in the area from enforcing the reciprocal negative easement, as is evidenced in the case of
Schadt
v.
Brill,
The essential elements for proof of reciprocal negative easements are (1) a common grantor; (2) a general plan; and (3) restrictive covenants running with the land in accordance with the plan and within the plan area in deeds granted by the common grantor.
Allen
v.
City of Detroit,
We likewise believe, as did the chancellor, that for defendants to formulate such a plan, sell restricted lots in pursuance thereof, watch homes be built by their grantees in reliance thereon, and then purchase back an unrestricted lot in 1 of the same blocks and propose to use same for a commercial use, would constitute fraud, actual or constructive. Defendants obviously had knowledge of all the facts in the matter. There is no showing that plaintiffs did. The chancellor was right in holding, on these facts, that defendants were estopped to deny that lot 4, block 2, was likewise subject to a reciprocal negative easement. 19 Am Jur, Estoppel, §§ 33, 34.
In Brownson v. Bandeen, we likewise affirm the chancellor’s decree. Costs to appellees.