Marketplace App Development – How Elegant Media helped Builders Buys turn leftover construction materials into a scalable mobile-first marketplace platform that connects builders, renovators, wholesalers and suppliers.
Background
The Australian construction industry employees over 1.3 million people and is set to drive over AUD$ 600 billion in revenue by 2026. With such a large footprint, the market for construction material be it new or used, is extremely large.
The construction industry has long dealt with a familiar but costly problem: leftover materials. At the end of every project, builders and contractors are often left with surplus stock — unused timber, fixtures, fittings, and other materials that have nowhere to go. Without a practical way to sell them, these items either sit in storage (at ongoing cost) or end up in a landfill.
Builders Buys is a dedicated marketplace platform tailored to the construction industry designed to streamline the buying and selling of leftover construction materials for builders, renovators, wholesalers and individuals.
The idea for the app was born when the app founder was once tasked with getting rid of leftover materials, at the end of a construction project.
“At the end of each individual construction project there is often a large inventory or materials that needs to be re-used, re-purposed or disposed of. This meant either going on multiple platforms and trying to sell the items or having to pay someone else to take them to a landfill or even having to pay to store them.”
Existing general marketplace apps weren’t suitable — they attracted unvetted buyers, required significant time investment to manage, and weren’t designed with the construction trade in mind.
Furthermore, dealing with such matters for tradespeople, contractors, and builders is often time intensive and involves having to deal with multiple suppliers, vendors and third parties in order to be completed.
The concept for Builders Buys emerged from these very challenges.
Sell or Ditch
The founders of the Builders Buys mobile app identified a gap in existing marketplace solutions for the construction sector: general buying/selling platforms lacked industry relevance, filtering tools, and user experiences that catered to builders’ unique workflows.
“It all started when I was tasked with the requirement to sell off a bulk of leftover materials, at the end of a construction project. Nobody at the company wanted to deal with all the randoms on other marketplace apps, as we were all so busy and had no time, for time wasters. However, the materials were in the way, so they had to go. If they were not sold, we would end up paying to send them to landfill!”
The owner of the Builders Buys Mobile App approached Elegant Media to build, develop and deploy a dedicated mobile-first marketplace platform that would efficiently, productively and profitably address the needs of all stakeholders in the construction industry.
The core mission of the Builders Buys Mobile App was to streamline the process of disposing of leftover building or renovation materials not only between builders and individuals, but between businesses as well.
The vision was clear: build a dedicated, industry-specific marketplace where builders, renovators, wholesalers, and suppliers could buy and sell construction materials simply, efficiently.
The Builders Buys Mobile App would therefore:
- Offer construction companies a straightforward way to get rid of unwanted building materials
- Provide a digital mobile-first platform for easy listing, buying and selling of inventory specific to construction products
- Empower subordinates such as site supervisors to directly list and sell construction related items
- Provide potential business and individual buyers with a convenient one stop digital destination to fulfill their construction material requirements
Solution – Marketplace App Development
Elegant Media designed and developed the Builders Buys mobile application — a purpose-built marketplace for the construction industry, using Kotlin for Android and Swift for iOS.
The app was built with two key user groups in mind: those selling materials (builders, renovators, wholesalers, and suppliers) and those buying them (other builders, renovators, individual consumers, and businesses). The platform accommodates both casual, one-off transactions and more structured, high-volume commercial activity as well.
Key features delivered in the solution include:
Free Open Marketplace Access — Users can download the app and begin buying and selling immediately, without needing a subscription. This lowers the barrier to entry and encourages adoption across the industry.
Subscription Tiers for Targeted Listings — Sellers can choose to restrict their listings to verified, subscription-level buyers. This is particularly valuable for businesses that want to avoid time-wasters and deal only with serious trade professionals or bulk purchasers.
Multi-User Sub-Accounts — Builders and suppliers with teams in the field can create sub-accounts for site supervisors, administrators, or sales staff. All payments are consolidated under one business account, making it easy to manage revenue from materials sold across multiple sites.
Auction listings for large lots— Wholesalers and established suppliers can list stock via an auction format. This gives sellers a powerful mechanism for clearing large volumes quickly while creating competitive pricing for buyers.
Business-to-Business (B2B) Capability — Beyond individual sellers and buyers, the platform supports direct B2B transactions, allowing wholesalers to target other builders and negotiate bulk purchases at scale.
The Builders Buys Mobile App is today a go to digital platform for both buyers and sellers in the construction industry. The app’s features and functions make it indispensable for those looking to fulfill their requirements in terms of disposing of or acquiring construction materials.
“The platform was born from a real-world need: clearing excess materials from construction sites efficiently without waste or costly disposal. Its core ethos is simple — connect serious buyers with genuine sellers in a streamlined mobile experience.”
The Builders Buys App Development Challenges & Solutions – Marketplace App Development
1. Managing individual subscriptions [Features]
Challenge: Beyond the free tier, Builders Buys offers premium subscription plans designed to unlock greater value for trade professionals. Ensuring a seamless experience for subscribers was a top priority — from the moment a user upgrades, the app needed to instantly recognise their subscription status and deliver the associated benefits without friction, delays, or unnecessary steps.
Solution: The Elegant Media development team engineered a robust backend system capable of distinguishing between free and premium subscribers, tailoring the in-app experience to each user type. Premium users — typically serious trade buyers — unlock advanced capabilities including real-time search and dynamic filtering, giving them the speed and precision they need to source products efficiently. This tiered approach was a deliberate design decision: keeping the experience clean and accessible for casual users, while delivering the depth and functionality that serious business users demand.
2. Designing a frictionless User Experience (UX) and User Interface (UI) [Usability & Navigation]
Challenge: The construction industry has historically been one of the slower sectors to embrace digital transformation, which meant the design and user experience of the Builders Buys app had to work harder than most. There was little room for complexity or confusion — the app needed to feel intuitive from the first tap, with a clean interface that required no learning curve. Just as importantly, it had to serve a genuinely diverse user base under one roof: from individual buyers and small-scale builders through to large construction firms and wholesale suppliers, each with their own workflows, priorities, and expectations. Striking that balance between simplicity and versatility was central to every design decision made throughout the project.
Solution: Drawing on its experience delivering digital solutions for the trades and industrial sectors, the Elegant Media UI/UX team crafted a clean, modern, mobile-first interface built specifically for the way construction professionals work, guiding users through a logical journey. The result was an experience smooth enough to earn repeat engagement, with an interface that users could rely on whether they were browsing quickly on a job site or making considered purchasing decisions back at the office.
“The design and user experience ensured seamless sign-up and account creation and that relevant listings were presented quickly to both individual and business buyers. The app’s clean interface and straightforward user experience were designed to appeal to trade professionals who need to get things done quickly, without navigating complex or unfamiliar technology. The result is an app that gets users to their goal — buying or selling — with minimal friction.”
3. Ensuring Cross-Platform Compatibility [Functions]
Challenge: For an app targeting Australia’s construction industry, where users might be jumping between an iPhone on a job site and an Android tablet back at the office, delivering a consistent experience across devices and platforms wasn’t just a nice-to-have — it was essential. Any inconsistency in performance, layout, or functionality risked breaking user trust and undermining the app’s long-term adoption.
Solution: Elegant Media built the Builders Buys app using Kotlin for Android and Swift for iOS — a deliberate choice to leverage native development on each platform rather than opting for a one-size-fits-all approach. By building natively, the team was able to unlock the full performance capabilities of each operating system, resulting in faster load times, smoother interactions, and a more responsive feel overall. The app then underwent extensive cross-device testing to iron out any inconsistencies, ensuring that whether a user was on the latest iPhone or an older Android device, they received the same reliable, high-quality experience.
4. Sub Account Facility [Features]
Challenge: In the construction industry, it’s common for a single company to be running multiple active sites simultaneously — each generating its own surplus materials and equipment ready for resale. To reflect this reality, the Builders Buys app had to support multi-user access within a single seller account, allowing different team members across various sites to independently upload and list items for sale. This meant larger organisations could manage their surplus inventory at scale, without bottlenecking the process through a single user or administrator.
Solution: To support this, the Elegant Media backend development team built a flexible multi-user permission system, allowing companies to assign subordinate users as either sellers or moderators depending on their role. Each user can independently manage listings across their respective sites, while all transaction proceeds are automatically consolidated and directed to a single nominated business account. This gave larger construction companies the operational flexibility they needed, without complicating the financial side of things.
5. Auction Listings for Large Inventories [Features]
Challenge: Construction projects often generate significant volumes of surplus materials — and when it comes to moving large lots quickly, a standard fixed-price listing simply doesn’t cut it. To address this, the Builders Buys app needed a fully functional auction capability, giving sellers a practical and competitive way to offload bulk inventory while opening the door for buyers to secure large quantities at market-driven prices.
Solution: Elegant Media designed and built a fully integrated auction feature, making it straightforward for buyers to browse and bid on bulk stock lots sourced from construction projects across the country. Rather than opening auctions to all users, access is reserved for subscribers — a deliberate design decision that acts as a natural quality filter. By ensuring that only committed, paying members can participate in auction listings, the platform cultivates a more serious and engaged buyer pool. Sellers benefit from knowing their listings are reaching genuine, motivated buyers, while the platform itself builds the kind of trust and credibility that drives long-term engagement from both sides of the marketplace.
5. Notifications for real-time communication [Functions]
Challenge: In a fast-moving marketplace where deals can hinge on timing, keeping buyers and sellers informed in real time wasn’t optional — it was fundamental to how the platform needed to function. Whether a bid had been placed, an offer accepted, or a listing updated, all parties needed to be notified instantly to avoid missed opportunities, disputes, or delays that could erode confidence in the platform.
Solution: To deliver on this, the Elegant Media technical team integrated a robust push notification and in-app messaging system that keeps every transaction moving without interruption. From bid updates and order confirmations through to seller responses and listing alerts, users receive timely, relevant notifications that prompt action at every stage of the buying and selling process — reducing drop-off, minimising back-and-forth delays, and keeping the entire marketplace operating efficiently.
Results – Marketplace App Development
Since its launch, the Builders Buys app has successfully delivered on its founding promise: making the buying and selling of construction materials as straightforward as possible.
Key outcomes include:
- A functional, publicly available marketplace app tailored specifically to the construction industry.
- A scalable tiered model that supports casual users, trade professionals, and large commercial operators under one platform.
- An auction feature that opens up a new commercial channel for wholesalers looking to clear bulk inventory.
- A multi-account system that allows businesses to manage listings and sales activity across multiple teams and job sites from a single account.
- A digital solution that actively reduces construction waste by giving surplus materials a viable second-life market, rather than sending them to landfill.
For construction company owners, the Builders Buys App presents an efficient and productive Marketplace App Development method not only to dispose of excess project materials but also track and monitor that progress achieved though a single dashboard.
From the palm of their hands, serious buyers from a trade-focused audience can now quickly browse through listings from multiple sites using filters to narrow down their search requirements and make purchases or place bids with the utmost ease and convenience.
For companies with multiple sites and locations, business owners can easily create sub-accounts, so they can delegate listing and sales tasks to local managers or administrators, with all revenue directed to a central location.
Conclusion – Marketplace App Development
The Builders Buys project is a strong example of Marketplace App Development and what’s possible when smart design and solid development come together to solve a real industry problem. From the initial discovery phase through to launch, Elegant Media worked closely with the Builders Buys team to deliver an app purpose-built for the Australian construction industry — one that balances powerful functionality with a straightforward, easy-to-use experience.
With a growing user base and a feature set tailored specifically to the needs of trade buyers and sellers, Builders Buys is well on its way to becoming the go-to marketplace for construction materials and equipment across Australia.
