OPINION
The City of Emory appeals a trial court judgment embodying a jury’s $10,000.00 award to Scott and Lisa Lusk as damages for a sewer easement taken by the City through inverse condemnation. In six issues, the City contends the judgment should be reversed because the Lusks consented to the taking, waived their right to seek damages, and failed to present evidence sufficient to support the award of damages. Contending the City is not im *82 mune from suit, the Lusks appeal from a partial summary judgment granted in favor of the City on the Lusks’ breach of contract claim. We affirm the trial court’s partial summary judgment and suggest a remittitur of a portion of the damages awarded in the judgment incorporating the jury verdict.
Background
The Lusks own a two acre trailer park within the city limits of Emory. The City of Emory approached the Lusks about placing a sewer line on an east — west axis through their trailer park. The City determined that the east — west sewer line would best be placed under the only driveway that went through the Lusks’ trailer park. The Lusks agreed for this driveway to be torn up in exchange for construction by the City of a similar driveway. The Lusks executed an “Easement For Sewer Purposes” to the City of Emory on March 8, 2005. As part of the terms of the easement, which was to be no more than twenty feet wide, nothing could sit on the ground above the sewer line without express permission of the City.
Following execution of this easement by the Lusks, the city council considered plans for the sewer project, which was being partially financed by a $700,000.00 grant from the federal government. Lisa Lusk was a member of the city council while these plans were being formulated and approved. After the necessary procedural steps had been taken, construction commenced on the sewer project. When the City began laying a second sewer line on a north — south axis across part of the trailer park, Scott immediately told Clyde Smith, the senior administrator for the City of Emory, that this was not part of the agreement. Smith confirmed Scott’s testimony during trial. Even after Scott’s immediate objection to the north — south sewer line, the City completed laying the second easement on the north-south axis across the Lusks’ property.
After the City completed its work in their trailer park, the Lusks filed suit against the City. They alleged a cause of action for inverse condemnation seeking a monetary award for the sewer line that had been placed on their property on a north — south axis and a cause of action for breach of contract because the City replaced the driveway on their property with one approximately half the width of the driveway the City had destroyed. The City filed a motion for summary judgment alleging entitlement to judgment as a matter of law on the inverse condemnation cause of action on the basis of consent, on the breach of contract cause of action on the ground of estoppel, and claiming governmental immunity for both causes of action. The trial court granted a partial summary judgment for the City without stating its reason, ordering that the Lusks take nothing on their cause of action for breach of contract. The inverse condemnation claim was tried before a jury, which awarded the Lusks $10,000.00 on that claim.
Breach of Contract
In the one cross issue filed by the Lusks, they contend that the City was not entitled to governmental immunity and therefore the trial court erred in granting the City’s motion for summary judgment on the breach of contract claim. In its motion for summary judgment, the City asserted entitlement to judgment on the breach of contract claim on the bases of estoppel and governmental immunity. The trial court’s partial summary judgment recites that the City is entitled to summary judgment as a matter of law as to the breach of contract cause of action and ordered that the Lusks take nothing *83 on their breach of contract claim. However, the judgment does not state the basis of the trial court’s ruling.
Standard of Review
We review the trial court’s summary judgment de novo.
Tittizer v. Union Gas Corp.,
Governmental Immunity
In Texas, governmental immunity has two components: immunity from liability, which bars enforcement of a judgment against a governmental entity, and immunity from suit, which bars suit against the entity altogether.
Tooke v. City of Mexia,
Further, the legislature has established governmental functions for which a municipality enjoys immunity unless immunity has been waived under the Texas Tort Claims Act.
See
Tex. Civ. PRAC. & Rem.Code Ann. § 101.0215(a) (Vernon 2005). Specifically named is the provision of water and sewer service.
See
Tex. Civ. Phac.
&
Rem.Code Ann. § 101.0215(a)32. Therefore, due to the City’s immunity, the Lusks are precluded from filing a suit for breach of contract related to the laying of the sewer lines that cross their trailer park.
See City of San Antonio v. BSR Water Co.,
Inverse Condemnation — Affirmative Defenses
The City appeals from the jury verdict and trial court rulings concerning the inverse condemnation claim. In its first four *84 issues, the City argues that the Lusks consented to the easement and waived their complaints.
Standard of Review
A trial court may disregard a jury’s findings and grant a motion for judgment notwithstanding the verdict if a directed verdict would have been proper.
Fort Bend County Drainage Dist. v. Sbrusch,
When the party who had the burden of proof at trial attacks the legal sufficiency of an adverse finding, that party must show that the evidence establishes, as a matter of law, all vital facts in support of the issue.
Dow Chem. Co. v. Francis,
When reviewing a factual sufficiency challenge to an issue upon which that party had the burden of proof, the moving party must demonstrate that the adverse finding is against the great weight and preponderance of the evidence.
Dow Chem. Co.,
Consent
In its first issue, the City contends that the trial court exred in overruling its motions for directed verdict and for judgment notwithstanding the verdict because the evidence proved as a matter of law that the Lusks consented to the north — south sewer line. In its second issue, the City contends that the jury’s answer to Question Number 1, that the Lusks did not consent to an easement for the installation of the second sewer line, is against the great weight and preponderance of the evidence and is manifestly unjust.
Article I, section 17 of the Texas Constitution provides that “[n]o person’s property shall be taken, damaged or destroyed for or applied to public use without adequate compensation being made, unless by the consent of such person.”
*85
Tex. Const, art I, § 17. An inverse condemnation proceeding is the proper avenue to seek redress when property has been taken or damaged for public use without compensation or a proper condemnation proceeding.
City of Houston v. Texan Land & Cattle, Co.,
Consent is an agreement, approval, or permission as to some act or purpose, given voluntarily by a competent person. Black’s Law DigtionaRY 300 (7th ed. 1999). Consent is an affirmative defense to a landowner’s takings claim.
See Patel v. City of Everman,
The March 8, 2005 easement calls for a single strip of land to be used for the sewer easement. The testimony of Scott Lusk, which was unobjected to by the City, showed that the easement he agreed to ran down the Lusks’ driveway through their trailer park on an east — west axis. Nothing in the easement contemplated construction of a second sewer line running on a north — south axis across the Lusks’ property. The placement of the north-south sewer line was therefore an additional taking not covered by the March 8, 2005 easement. Further, Scott Lusk immediately told Clyde Smith, senior administrator of the City of Emory, that the second sewer line being laid on the north — south axis was not part of the written easement. Smith did not attempt to contradict this testimony.
The City contends that Lisa Lusk consented to the laying of the second sewer line while she was a member of the city council in Emory. Even had her actions as a councilwoman constituted consent, this would not have been enough because the record before us shows that the trailer park was community property held jointly by Scott and Lisa Lusk. Community property held in the names of both spouses is considered joint management community property.
See
Tex. Fam.Code Ann. § 3.102(c) (Vernon 2006). Lisa, acting alone, could not encumber the Lusks’ trailer park.
See In re Marriage of Morrison,
The evidence did not prove as a matter of law that the Lusks consented to the north-south sewer line.
See Dow Chem. Co.,
Waiver
In its third issue, the City contends that the trial court erred in overrul *86 ing its motions for directed verdict and for judgment notwithstanding the verdict because the evidence proved as a matter of law that the Lusks, by the terms of the easement, waived their right to seek damages. In its fourth issue, the City contends that the evidence is both legally and factually insufficient to support the jury’s answer to Question Number 2, that the Lusks did not waive their right to seek damages. It argues that the Lusks agreed that adequate consideration was paid for the easement.
Waiver is an intentional relinquishment of a known right or intentional conduct inconsistent with claiming that right.
Sun Exploration & Prod. Co. v. Benton,
Here, the easement signed by the Lusks specifically called for one sewer line. The evidence introduced at trial conclusively showed that not only was there a sewer line running across the Lusks’ property on a east — west axis but also a separate one running on a north — south axis. Further, the evidence showed that when the City began laying the pipeline on the north— south axis, Scott Lusk immediately contacted Smith to register his strong objection.
The City contends that the clause in the easement that said “[t]he consideration recited herein shall constitute payment in full for all damages sustained” acted as a waiver by the Lusks to seek any damages for the second sewer line. In essence, the City is contending that the Lusks gave them a blank check to do whatever it wished to on their property. This contention is rebutted by the language of the easement itself when it states “the Construction easement being a strip of land across the tract referred to above, fifty (50 feet) in width.” This language is unambiguous that only one strip of land for a sewer easement was contemplated by the parties when the easement was executed. Thus, the “consideration recited herein” could not apply to the north-south line. Waiver was not proven as a matter of law, and the trial court did not err in denying the City’s motion for directed verdict or its motion for judgment notwithstanding the verdict.
See Dow Chem. Co.,
Inverse Condemnation — Damages
In issue five, the City contends that its motions for directed verdict and for judgment notwithstanding the verdict should have been granted because there was no evidence of damages sustained by the Lusks. In its sixth issue, it contends that the evidence was not legally and factually sufficient to support the jury’s award of $10,000.00 in damages.
Standard of Review
A challenge to a damages award is reviewed as any other challenge based on legal and factual sufficiency of the evidence.
See State v. McCarley,
If a party is attacking the factual sufficiency of the evidence to support a finding on an issue for which the other party had the burden of proof, the attacking party must demonstrate that there is insufficient evidence to support the adverse finding.
Westech Eng’g, Inc. v. Clearwater Constructors, Inc.,
Measure of Damages
Compensation for land taken by eminent domain is measured by the fair market value of the land at the time of the taking.
Exxon Pipeline Co. v. Zwahr,
In arriving at the fair market value of property made the subject of condemnation proceedings, the preferred approach is to utilize comparable sales. Id. However, the income approach to value is appropriate when property would, in the open market, be priced according to the income that it already generates. Id. at 183. By estimating this future income and applying a capitalization rate, the income approach allows the appraiser to arrive at a present value for the income producing property. Id.
When, as here, a condemnor takes only a portion of a landowner’s property, the landowner is entitled to compensation in the amount of the market value of the part taken plus the damage to the remainder caused by the condemnation.
Zwahr,
The starting point of our analysis is the charge submitted to the jury.
McCauley,
What damages, if any, occurred to Plaintiffs’ property as a result of the sewer line easement along a 20 foot x 110 foot strip of land south of the road through Plaintiffs’ trailer park?
In considering the amount of compensation, if any, to be awarded to Plaintiffs, you are to consider the fair market value of the portion of the real property constituting the 20 foot x 110 foot strip of land south of the road through Plaintiffs’ trailer park along which the sewer line was installed and the diminished fair market value, if any, to the remainder of Plaintiffs’ trailer park.
The jury was thus correctly instructed to calculate the Lusks’ damages by considering the fan- market value of the strip of land where the sewer line was installed and the diminished value of the remainder of the trailer park.
See Westgate, Ltd.,
Landowner’s Valuation Testimony
The Lusks paid $30,000.00 for the trailer park in 2001. Scott Lusk determined the amount of damages to his property based on the income method of valuation. He testified that the property had been rented solely for single-wide mobile homes throughout the time they had owned the trailer park. However, three of the fourteen lots in the mobile home park could accommodate a double-wide. Scott further testified that because the second sewer line, running north to south, had been placed upon one of these three lots, they are able to park only a single-wide mobile home on that lot.
Scott testified that he and Lisa could receive $250.00 per month for a double-wide mobile home on this lot. They had been receiving $160.00 per month for a single-wide mobile home on this lot. He also testified that at the time of the taking, as well as at the time of trial, this particular lot had been used only for a single-wide mobile home. He testified that he and Lisa had never leased any of the lots in the mobile home park for a double-wide. However, he also testified that they had purchased a double-wide mobile home, but were waiting to move it into the park. Scott explained that, because of the second sewer line, they would lose $90.00 per month, the difference between the $250.00 that a double-wide could be leased for compared to the $160.00 for a single-wide. Scott determined that, over a ten year period, they would lose $10,800.00, but they asked for $10,000.00 for compensation from the City for this taking.
The City contends that this is no evidence of market value. It is well settled that the naked and unsupported opinion or conclusion of a witness does not constitute evidence of probative force and will not support a jury’s finding even when admitted without objection.
Dallas Ry. &
*89
Terminal Co. v. Gossett,
Here, the Lusks had never rented a double-wide mobile home in them trailer park during the five years in which they had owned it. Scott’s testimony using the income approach was purely speculative in assuming that they could lease the lot for a double-wide every month for the next ten years. Furthermore, he did not take expenses into account. Scott testified that it would cost $5,000.00 to move a double-wide mobile home into their trailer park. This $5,000.00 should be included in the capitalization calculations but was not part of Scott’s calculations.
See Sharbo-neau,
The City’s Valuation Testimony
The City introduced evidence of the value of the real property through Don Spencer, a local real estate broker. Spencer testified that he determined the twenty foot by one hundred ten foot sewage pipeline easement on the north-south axis has a value of $990.00. He testified that he arrived at this value by determining the square footage of the easement and then applying comparable sales figures in the City of Emory and Rains County to the property condemned. However, he did not consider or testify as to any diminution in the value of the remainder of the Lusks’ trailer park.
Although the Lusks attempted to prove damages based on the income approach, they presented no probative evidence of valuation. However, the record includes some evidence of damages, that is, the market value of the part taken, $990.00. But the evidence does not include a showing of the diminution in value of the remainder of the land, if any, caused by the taking.
See Westgate, Ltd.,
Conclusion
We affirm the trial court’s partial summary judgment on the Lusks’ breach of contract claim.
The evidence is factually insufficient to support the $10,000.00 damage award on the inverse condemnation claim. The Lusks must be given the option of accepting a remittitur or having the cause remanded for a new trial.
See Larson,
Affirmed, in part and conditionally affirmed in part.
