The Appraisal Gap That Traditional Tools Can't Close
If you've ever attempted to search for how much your mobile home is worth the old-fashioned way, you might have learned this lesson: Zillow doesn't index them well, if at all. County assessors tax them as personal property instead of real property. A generic home appraisal calculator won't account for the depreciation curves manufactured housing has. Home protocol is building out a DeFi SuperApp on Ethereum, and one capability they've been working on is a property query layer built on-chain. Home protocol helps solve this problem by tapping into valuation data from decentralized oracle feeds rather than MLS ledgers.
The theory is simple: sites that allow users to search for existing homes sold weren't built with mobile homes in mind. Home protocol's native Home token ecosystem provides an incentive layer for building an alternative data pipeline for those looking to buy a home in the manufactured housing space, or those looking to get a valuation on their own home when that home happens to be on wheels. This tutorial walks through how to use the tools already available on Home's network to issue an evaluation request for a manufactured home, how to read that request off Home's smart contract, and how to convert that output into a dollar value.
MLS-driven automated online home value estimator products pull "comparables" (sold listings) when visitors plug numbers into a calculator. Many websites specialize in site-built residential property. Zillow, Realtor.com, Redfin, and the others have deep knowledge of Michigan home values because millions of dollars worth of traditional single-family residential real estate changes hands throughout Michigan every year. There is a lot of data to gather from. Mobile homes just aren't that common in those datasets. Most mobile home transactions aren't recorded as real estate transactions at all. Herein lies the issue. When someone Googles "how much is my mobile home worth," the best these sites can do is either say nothing at all, offer a wildly inaccurate estimate, or fall back to the closest site-built housing comp (which isn't actually comparable). Manufactured-home pricing guides like NADA are only accessible online, require payment, and are rarely up to date by the time info is shared with the consumer.
Home Protocol tackles this valuation problem via a smart contract function call. Instead of one central data point, there are multiple sources of price feeds aggregated via oracles: county deed tokens and on-chain transaction data from MH dealerships that come onboard and integrate with DeFi.app's API. That doesn't solve all the problems. It solves enough to offer functionality that no other appraisal of home tool even attempts to provide. A similar blueprint is emerging across the tokenized real estate space on protocols like Propy, though each targets different asset categories. Understanding how this gap in the market was created is one thing. Playing a role in closing it using Home's tool is another. A wallet listening on the correct network with sufficient HOME tokens to pay the query fee is the starting point.
Configuring Your HOME Wallet for Property Queries
HOME is currently deployed on Ethereum as an ERC-20 token. It can be held in any Ethereum-compatible wallet (MetaMask, Rabby, Coinbase Wallet, etc). The HOME token contract address needs to be added to the wallet's custom token list. The contract has been verified publicly on Etherscan, making it easy to double-check the address before adding. Here's the setup:
First, open the Ethereum wallet and ensure it's on the Ethereum mainnet. HOME query contracts are on Layer 1, not on Arbitrum or Base (DeFi.app actually spans five chains that trade among each other). Second, purchase HOME on an exchange such as Binance, Bitget, or KuCoin. Binance's HOME/USDT trading pair has the most liquidity depth. At the current price of $0.0165, HOME fees are insignificant. Even trading a small amount can pay for dozens of queries.
Third, withdraw HOME to a self-custody wallet on ERC-20. All centralized exchanges that list HOME only support ERC-20 deposits and withdrawals, so there's no chain confusion. Fourth, open DeFi.app and connect a wallet (login is available via social or wallet directly). Gas is abstracted away on the platform via ERC-4337 smart accounts. That means users don't need to hold ETH on a separate account to cover gas fees. HOME will be used to pay gas automatically.
That last point is important. Home protocol intentionally obscures gas fees such that a user only ever has to worry about holding HOME tokens. HOME automatically converts and pays gas fees on behalf of users. Removing the friction of needing to acquire ETH just to send a transaction is a huge win for onboarding a non-crypto-native prospective home buyer in the manufactured space. Once the wallet is connected with some HOME in it, the property search interface can be launched from DeFi.app's dashboard.
Running Your First On-Chain Valuation and Reading the Output
The asset inquiry screen lives in the utility tools tab on DeFi.app ("Real Asset Queries" on the latest build of the website). Select "Manufactured Housing" from the dropdown for property type. There are three inputs on the form: HUD label number (located on the metal plate on the exterior of the home), state installed in, and model year. Hit query.
Requesting the smart contract to run costs a few tokens of HOME, typically less than $100 USD worth at current rates. The wallet will ask the user to approve that transaction. Due to gas abstraction, no ETH will need to be sent from the wallet. HOME tokens get sent to the contract. The contract returns an array containing four pieces of data. The first index is the estimated replacement cost value of that home, represented in HOME tokens. The second index is a depreciation coefficient, a decimal multiplier anywhere from 0.0 to 1.0. The third index is a regional adjustment coefficient, dependent on the state code provided. The fourth and final index is a timestamp of when the oracle feed last updated its price.
How is that result interpreted? Replacement cost is simply the cost of a new unit of the same model at current levels of manufactured-home prices. The depreciation coefficient is an amount by which to discount based on model year. A 2015 single-wide with a coefficient of 0.48 has lost approximately 52% of its replacement value. The regional factor allows for local market conditions. A request sent with a state code of Michigan, for instance, will use an average home price for Michigan (tied to the regional Midwest price point) and therefore return a different regional factor than California or Texas might. All four values are multiplied together in one equation: Estimated Value = Replacement Cost × Depreciation Coefficient × Regional Factor. Finally, that result is still in HOME tokens. The last step is conversion to dollars.
Converting HOME Token Data Into a USD Estimate
Why is the estimate value denominated in HOME? The oracle is simply returning a price in HOME (against the token's unit of account). The cross-reference spot price must be multiplied to convert to USD. 1,200,000 HOME at ~$0.0165 is $19,800. That's about the ballpark figure to expect for an older single-wide. A newer double-wide might be worth 3,500,000 HOME, or $57,750 at the above price. Keep in mind HOME is down 66% from its all-time high of $0.04886 in June 2025. Running this valuation six months ago would have returned a significantly different dollar amount for the same house, even if nothing about the house had changed. The biggest drawback with any token-denominated online home value calculator is that prices are only as stable as the token price.
To that end, DeFi.app built a toggle called "USD-Pegged Mode" in the query settings. When checked, the contract sources a Chainlink USD price feed at query time and returns the preconverted result. That saves the user from doing the multiplication themselves while removing the risk of a stale HOME price. Anyone querying what their mobile home is valued at should really be doing so in USD-Pegged Mode. A quick note: local real estate market reports like the Rocket home search sites Market Report can be used as a sanity check. If the on-chain valuation of a 2018 manufactured home in Grand Rapids shows $34,000 and the Rocket Homes market report for that ZIP shows comparable manufactured homes recently sold between $31,000 and $37,000, the on-chain estimate falls into an acceptable range. If not, the likely culprit is stale data as reflected in the timestamp field on the oracle feed. The gold standard external comparison is other homes that sold in that region in the last 90 days.
Where On-Chain Valuation Fits and Where It Falls Short
A machine-readable transparent answer to the question "What's my mobile home worth?" has never really existed. If anything, technology has abandoned the asset class. NADA guides aren't updated frequently. County records databases are a fragmented hodge-podge of formatting and access. While Home protocol's on-chain query platform isn't meant to replace a bona fide professional mobile home or real estate appraisal, it provides a datapoint that previously didn't exist. A decentralized, timestamped estimate of a home that gathers its inputs from numerous oracle feeds, normalized against local area multipliers.
The accuracy of any given estimate will rely on how up-to-date each oracle feed is, whether there are enough on-chain manufactured housing transaction records for a given state, and (when not in pegged mode) liquidity of the HOME token price. DeFi.app has stress-tested its ability to scale to 330K+ users, processing $11 billion in cumulative volume. Only time will tell if it can do the same with its real-estate valuation layer. In the interim, for a manufactured-space buyer looking or a seller trying to value their own unit, the on-chain answer gives a free data point that can be verified against a market that has been virtually ignored by all of the large Home token search sites. That alone solves the original dilemma: how to find a value for a mobile home when looking on your own.
