Real builds from real GDG chapters. Two hours, one pizza, one prototype. Search by name, narrow to a GDG group or a date range — or scroll until something makes you want to fork it.
Our project is called Home Lens and its a way for renters to avoid unfair deductions from landlords. Renters scan any letters along with their house, and our app matches it with the VA law to find any unfair deductions from the security deposit.
“I was surprised with Gemma's capabilities to analyze damages during move in from our 3d scan and its comparison to Virginia Law for unfair deductions from the security deposit.”
ADAPT is a tool that helps people make their homes easier to move around in, especially people with mobility issues. Users can upload a floor plan, explain what they need, and enter their budget. ADAPT then finds areas that could be improved and suggests changes. It also shows the before and after in 2D and 3D so users can see what their home could look like.
“What surprised us was how we were able to connect different technologies to analyze an uploaded floor plan. We had to get the frontend, backend, AI, and geometry system to work together to identify problems and suggest changes. It was cool to see how all these different parts came together to make our idea work.”
Clearlease is a pre-sign check for renters in Virginia, DC and Maryland. Paste a rental listing or snap a photo of a lease, and Gemma 4 reads it into facts with exact quotes; our code verifies every quote and decides three verdicts: is the price normal (HUD and Census data), are there FTC rental-scam warning signs, and which lease clauses conflict with state law. Every flag shows the words that triggered it, and nothing you paste is stored.
“A simple keyword filter was about as good as our AI on ordinary listings; Gemma only earned its keep on the disguised scams (misspellings, Spanish, screenshots, and "we never take Zelle" disclaimers). That changed our pitch from "AI catches scams" to "AI catches the scams keywords miss".”
TrueCost Home helps homebuyers understand ownership costs beyond the asking price. It uses Gemma 4 to review property photos and written disclosures for potential concerns. Buyers review those findings, explore repair estimates backed by published sources, and see how repairs could affect their monthly budget and five-year cash flow. Built especially to support first-time buyers, it provides planning guidance rather than replacing a professional inspection or appraisal.
“We all did good job on distributing”
HomePick DMV is a web app that helps first-time renters in the DC, Maryland, and Virginia area find income-restricted apartments. You enter your income, then pick between two curated buildings at a time, and it learns what you care about. In the end, it hands you a final short list of homes with photos, what you’d actually pay, who to call, and much more. It also reads rental applications with Gemma 4, turns them into a simple checklist, and warns you about scams.
“We assumed affordable housing was a niche field, with only a few homes available. To our surprise, about 122,000 income-restricted homes across the DMV sit in public records that almost nobody reads.”
Roomwise is a housing research tool for Virginia Tech students that shows what a listing really costs. It separates per-person, whole-unit, monthly and installment prices, and flags the fees and lease facts still missing. Its cool part is a local, fine-tuned Gemma 4 assistant that explains the evidence, while the app's code keeps every price and calculation exact.
“I did not expect the google search engine to be a seperate feature not present inside the google cloud console”
Our tool helps renters document the condition of their rental so that they can protect their security deposit. A renter uploads a matched move-in and move-out photo of a room, and Gemma 4 (through the Gemini API) flags possible differences between them. The AI only suggests, as the renter reviews each flagged item, confirms or dismisses it, and adds a note. It only uses the confirmed items from the renter. From those items, the app makes a PDF evidence report with side by side photos, photo time
“How Gemma AI connected with other tools such as streamlit, pillow, etc allowed us to make a functioning website with actual use in only a day. Despite it being a rough submission, this is something that can be scalable and actually useful.”
For renters, especially college students signing their first lease, reporting a maintenance issue can be frustrating: taking photos, describing the damage, writing emails to landlords, and keeping track of previous complaints, all while worrying that their concerns may be ignored or disputed. FixProof simplifies this process by using Google's Gemma 4 AI to analyze repair photos, generate editable maintenance reports, and draft professional landlord emails in seconds. Every report is timestamped
“What surprised us most was how much more difficult it was to make AI trustworthy than to make it functional. Getting Gemma 4 to analyze repair photos was only the beginning; the real challenge was building safeguards around its uncertainty, protecting renters’ data, and creating verifiable records that people could confidently review and control.”
GAURD is an all in one tool that helps potential house buyers run a security check on their prospective city to ensure they are well informed about potential risks and crime rates. This security check not only provides current information about both violent and property crime, but also has a trained gradient boosted trees algorithm which predicts whether crime will rise in a given city 4 years from now.
“I excepted the promoting of Gemma to be simpler while using an API, but getting it to deliver standardized and accurate responses was difficult and took a mix of back end design changes and prompt engineering. I was impressed with the accuracy of our self made LightGBM when it came to predicting changes in crime rate as there were few studies on using Machine Learning to predict crime rates”
TerraSim tackles the housing shortage by exploring development opportunities on available or underused land. Outline a lot on a 3D map and describe your ideal housing project. Using Gemma via the Gemini API, TerraSim generates site-specific floor plans, furnished 3D walkthroughs, material quantities, and estimated costs. These estimates support early planning but do not replace professional engineering, code reviews, contractor quotes, or formal feasibility studies.
“We initially assumed that Gemma 4 was not that capable, and that we would run into problems during the implementation process. However, Gemma was better than we expected, and was able to complete the task of designing buildings and finding their cost quite well.”
HomeCrush helps home seekers discover what “home” means to them by designing and exploring a furnished, two story 3D house through conversation with Gemma. Refine colors, flooring, lighting, and décor, then explore real U.S. property listings through a Tinder-inspired experience with photos, hearts, and saved favorites. Traditional searches start with filters; HomeCrush starts with imagination, helping people find what they truly want in a home.
“A simple request like “walnut floors and more plants” could produce a good design idea, but Gemma would have a hard time implementing it in the 3d model since it is a fairly small model The biggest improvement came from adding a validation step to the process so Gemma could review what actually goes in the 3d model, so all the final changes are refined.”
Virginia renters can lose their deposit by missing a 5-day deadline to dispute the landlord’s move-in report. FinePrint turns their lease and phone camera into sealed evidence and deadline reminders to help avoid this. Got a question about your lease? Gemma 4 flags illegal lease clauses and answers questions with cited Virginia law.
“Choosing an iOS app made development extremely slow and difficult. We aspired to include every possible tool that could help a tenant, but with only 8gb of ram on an old mac mini, testing was a nightmare, with some features taking up to 4 hours to ship.”
