In this аction the plaintiff seeks a declaratory judgment determining “whether the plaintiff’s property has been effectively taken by the defendant and if so, the date of such taking.” The case was referred to Hon. Howard W. Alcorn, state referee, who, exercising the powers of the Superior Court, answered the question propounded in the affirmative and concluded that the property *336 “in a constitutional sense” was “taken by the Highway Department on September 8, 1966.” The defendant has appealed from the judgment rendered and from the denial of the defendant’s motion to open judgment.
The finding is not subject to any material change and discloses the following facts: The Fafnir Bearing Company, a Connecticut corporation, owned and operated several manufacturing plants in the towns of New Britain and Newington, one of which was located on John Street in New Britain. In August, 1962, the state highway department notified Fafnir that a proposed construction of state highway, route 72, might pass through all or a portion of the John Street plant. On November 4,1965, at a meeting with representatives of the highway department, Fafnir learned from an aerial photograph on which taldng lines had been drawn that the proposed highway would take two whole buildings and about half of another, and that the plant’s truck dock would be rendered unusable. Department representatives further informed Fafnir at this meeting that the proposed route could not be varied by as much as fifteen feet.
At another meeting with highway department representatives, in November, 1965, Fafnir was told that the taking lines were fixed, that these could not be significantly changed, and that both Fafnir and the highway department should proceed thenceforth on that basis. At that meeting Fafnir expressed concern over the effect which the taldng would have on the operations at the John Street plant and emphasized the great amount of time Fafnir needed to meet the problem.
Two months later, in January, 1966, the department prepared a map which depicted the taking of *337 a triangular portion of the John Street plant containing about .77 acre with buildings or parts of buildings thereon, then being used by Fafnir for parking, truck access, and steel storage. Over the years slight revisions of the taking map have been made, none of which made a significant change in the property to be taken as shown in the map of January, 1966. Then, on March 8, 1966, the department formally wrote Fafnir that it had found it necessary to acquire a portion of the John Street property; that it was promptly proceeding with surveys and title searches; that apрraisers would soon visit the property; that it would then discuss the purchase of the property; and that it hoped this would help Fafnir in its planning. Previously in January, 1966, highway department appraisers had already visited the property and Fafnir had furnished them data and information. Fafnir again met with highway department officials on April 12, 1966, and told them that it would be necessary to build and move to a new location, an operation whose completion would take about eighteen to twenty months. Fafnir considered it imperative that thе vital operations of the John Street plant not be interrupted. In response, the highway department considered the possibility of a tunnel design for that portion of the route, but this solution was found to be unacceptable to both Fafnir and the department.
Fafnir was told by the department that it must be out of the John Street property which was to be taken by 1967. Accordingly, Fafnir’s board of directors on July 21, 1966, voted to move the John Street plant operations to an addition to be constructed at the company’s Newington plant, in order to avoid a cessation of operations which, it was felt, *338 the taking process would necessitate. Later that month, on July 25, the highway commissioner informed Fafnir that “our design people” were being advised to proceed with normal highway construction through the area adjacent to Fafnir’s building and that the rights-of-way bureau would also be advised to proceed on that basis.
In September, 1966, the department advertised projects tentatively scheduled for construction bids, including a notice that the рortion of route 72 through the John Street plant was scheduled to be advertised for construction bids in November, 1966. Pursuant to General Statutes § 13a-57, on September 8, 1966, the department filed a map in the New Britain town clerk’s office depicting the layout of route 72 which ran through Fafnir’s John Street property.
In the same month, Fafnir began construction of the addition to its Newington plant, and during the summer of 1967 it completed this construction and moved the John Street operations to the Newington factory.
In January, 1967, the highway department аdvised Fafnir that actual construction would not begin until the summer of 1969, and completion would take place in two years. Over a period of several years, department representatives repeatedly stated their intention to initiate formal statutory condemnation proceedings by filing the certificate of taking as provided in § 13a-73 (b) of the General Statutes. There was evidence, and the trial referee in the unchallenged finding so found, that the defendant was fully prepared to proceed with the statutоry taking both in February, 1971, and at the time of trial. Nevertheless, no statutory pro *339 eednre to take the property was undertaken until August 22, 1973, when the defendant finally filed the certificate of taking, pursuant to § 13a-73 (b).
I
The defendant has challenged the jurisdiction of the lower court to entertain this action on several grounds. First, it is argued that the suit, although nominally brought against the commissioner of the department of transportation, is in truth one against the state; and that since the latter has not formally consented to be sued, and since therе is no statute specifically authorizing actions against the state for declaratory judgments, the suit is barred by the doctrine of sovereign immunity. Although this defense was raised for the first time in the defendant’s brief on appeal, questions such as this involving the court’s jurisdiction must be considered by this court if and when they are raised.
Wawrzynowicz
v.
Wawrzynowicz,
Connecticut has long recognized the common-law rule that the state, as a consequence of its sovereignty, is immune from suit unless by appropriate legislative action it has consented to be sued. See
Baker
v.
Ives,
The defendant contends that these principles and policies constitute an insurmountable obstacle to the plaintiff’s prayer for a declaration of its rights in the present case. The fundamental reasons underlying the doctrine of sovereign immunity, however, have no application here. This is not a еase in which the plaintiff seeks a judgment that will enable it to “control the activities of the state,” the customary touchstone upon which this court has determined whether a particular suit is one “against” the state.
Simmons
v.
Parizek,
Moreover, this court, has indicated on sevеral occasions that the doctrine of sovereign immunity is not available to the state as a defense to claims for just compensation arising under article first, § 11, of the Connecticut constitution. We have said, for example, that “ [w]hen possession has been taken from the owner, he is constitutionally entitled to any damages which he may have suffered, and if our statute failed to provide a remedy he could, nevertheless, sue to recover such damages. 6 Nichols, Eminent Domain § 26.42 [1].”
Trumbull
v.
Ehrsam,
The defendant assigns as error the denial of his motion to open judgment, in which he reiterated his trial court argument that the court should have dismissed the action for lack of jurisdiction on the ground that alternative procedures for relief were available to the plaintiff. Under Connecticut practice, a court will not render declaratory judgments where the court “shall be of the opinion that the parties should bе left to seek redress by some other form of procedure.” Practice Book §309 (c). “Where the complaint, on its face, discloses that another adequate remedy exists, the complaint is vulnerable to demurrer.”
Hartford Accident & Indemnity Co.
v.
Williamson,
n
The defendant claims that the facts as found by the trier below do not support the conclusion and judgment of the court that under the circumstances of this case thе plaintiff’s property in question was “taken,” within the meaning of article first, § 11, of the Connecticut constitution,
2
as a result of the defendant’s course of conduct leading up to and culminating in the filing of the layout map in the New Britain town clerk’s office on September 8,1966. The defendant further argues that, absent a showing of the initiation by the state of formal condemnation proceedings as provided under General Statutes § 13a-73 (b), a judicial declaration that private property has been taken by the state in a “constitu
*345
tiоnal” sense can be predicated only upon a “substantial interference” by tbe state with the owner’s property, and the defendant recognizes an actionable wrong and a right to compensation for a de facto taking in the constitutional sense where property rights were impaired by an authority which failed to exercise its power of eminent domain. The court’s conclusions are to be tested by the finding.
Hutensky
v.
Avon,
In actions involving public condemnation of private property pursuant to the government’s exercise of its right of eminent domain, the questions of the fact and the time of the taking of the property are important for two reasons. First, for the property owner’s right of just compensation to accrue, there must be a taking or injury of property within the meaning of a particular jurisdictiоn’s constitutional or statutory provision granting the right of compensation.
Katz
v.
Connecticut,
307 F. Sup. 480 (D. Conn.), aff’d,
A taking of private property by the state for highway purposes under Connecticut’s statutory
*346
eminent domain procedure is complete when the assessment provided for by General Statutes § 13a-73 (b) is filed with the clerk of the Superior Court.
Slavitt
v.
Ives,
supra, 206;
Carl Roessler, Inc.
v.
Ives,
The precise dimensions of a “substantial interference” sufficient to amount to a taking in the constitutional sense are not always clear since the concept of substantial interference is not a static one, but one that has developed over the years in response to the changing needs of our society.
3
It
*348
is certain, however, that an essential requirement to establish a taking in the constitutional sense under Connecticut law as it has evolved is that the state’s “substantial interference” with a landowner’s property rights involves the invasion of some specific legal interest in the property.
Dooley
v.
Town Plan & Zoning Commission,
supra;
Benson
v.
Housing Authority,
supra;
Bishop
v.
New Haven,
supra. The reason for this common constitutional requirement is the need for some definitive indication that the state’s intent to condemn the property in question has become fixed and irreversible. See
Carl Roessler, Inc.
v.
Ives,
supra, 136, citing 6 Nichols, Eminent Domain (3d Ed.) §26.42;
State
v.
Vaughn,
In this ease, state highway officials revealed the irreversibility of their department’s intent to condemn the plaintiff’s John Street property over a period of time from January, 1966, to September, 1966. By notifying the plaintiff of the necessity to acquire its property, by ordering Fafnir to be out of the plant by 1967, by filing a map which had the statutory effect of depicting that property as part of a legally laid out state highway, and by publishing its intent to advertise for bids for construction on the property, the state highway department made known to the plaintiff a decision to condemn the property which can only be said to have had assumed all the appearances of finality. As a result of these and other statements, decisions and actions by the state, the options open to Fafnir with respect to the disposition of its John Street operations became severely curtailed, and Fafnir was no longer able freely to use its property as it wished. It would have been wholly futile, for example, for Fafnir to have seriously considered expanding its activities or its facilities at the plant on the baseless hope that formal condemnation somehow would not occur.
*350
These facts, as they were found by the trial referee, supрort his conclusion that the state’s conduct substantially interfered with and lessened the plaintiff’s right to the use and enjoyment of the property. See
Hutensky
v.
Avon,
m
The defendant has also ássigned error in the denial of his motion to open judgment and dismiss the aсtion on the ground that Fafnir had not been joined as a party pursuant to Practice Book § 309 (d), which státes that a court will not render declaratory judgments upon the complaint of any person “unless all persons having an interest in the *351 subject matter of the complaint are parties to the action or have reasonable notice thereof.” The gist of the defendant’s argument is that Textron cannot properly represent Fafnir to enforce those rights of Fafnir which arose at the time of the purported taking while Fafnir was still the owner of the property, unless Textron has a right of its own in the subject of the controversy which a decree can affect; the defendant claims the complaint in this action did not allege, nor is there a specific finding, that Textron is the “bona fide owner” and assignee of a chose in action which it acquired from Fafnir concerning an unconstitutional taking of Fafnir’s property in 1966, as required by § 52-118 of the General Statutes. 4
It appears from the allegations in the complaint, the evidence presented at the trial, and from the finding that Fafnir was the “predecessor” of Tex-tron, that everything in its name was transferred to Textron, that all of its assets were acquired by its successor, Textron, and that it thereupon became a “division” of Textron. While the plaintiff, Textron, did not specifically allege in its complaint that it was the “actual bona fide owner” of any choses in action Fafnir might have had against the defendant arising out of the taking in a constitutional sense of the John Street property in 1966, this omission, if it was a defect at all, was merely one of pleading which the defendant might have taken advantage of by demurrer, and not by way of a post-judgment motion. See
Bennett
v.
Lathrop,
There is no error.
In this opinion the other judges concurred.
In view of the answer to the first question, an answer to the second became unnecessary.
Notes
Constitution of Connecticut, article first, § 11: “The property of no person shall be taken for public use, without just compensation therefor.”
Courts in other jurisdictions have considerably revised many of the traditional principles of the law of eminent domain in recent years. Under one line of authority, statements and actions by the condemning authority prior to the statutory taking, indicating a firm intent to condemn a person’s property and having a demonstrably adverse impact upon his interests, are described as amounting to a “promise” by the state to take the property, upon which the person may justifiably rеly, even if it is to his detriment.
Hilltop Properties
v.
State of California,
“[General Statutes] Sec. 52-118. action by assignee of chose in action. The assignee and equitable and bona fide owner of any chose in action, not negotiable, may sue thereon in his own name; but he shall in his complaint allege that he is the actual bona fide owner thereof, and set forth when and how he acquired title thereto.”
