Short answer. To sell off-plan to the diaspora in 2027, an Algerian developer does not first need a better website: they need a buyer portal fed by a site log. Every month the site manager photographs the same points on the site from a simple app; the dated photos are approved and then published in each buyer’s space, with the payment schedule, receipts, the unit’s documents and a named contact who answers within 48 hours. Before the sale, contacts from the fair are qualified and followed up; after it, handover is done with snags recorded in photos. What sells the next unit is the buyer who never had to get on a plane.
This guide is for property developers, architects, engineering firms and building contractors who sell, or want to sell, to Algerians living in France, and for the diaspora founder who wants to build the platform missing between the two shores. It does not cover the legal and tax rules of buying, which are a matter for the notary.
What the Paris fair says about the market
The SINA fair, dedicated to new-build property in Algeria, has been held in Paris since 2022. Its fourth edition, in October 2025, brought together 16 developers from five wilayas, Algiers, Oran, Ghardaïa, Tlemcen and Béjaïa, and more than 16,000 visitors according to the organisers, as reported by TSA. The fifth was scheduled for 23 to 25 October 2026. Prices quoted for high-end units range, according to the press, from 17 to 20 million dinars in Oran and from 25 to 35 million in Algiers. Demand comes to the stands on its own: the problem starts afterwards.
A visitor quoted by TSA summed up what follows: with her flat bought off-plan in Algiers, she said her project was “blocked because I can’t travel to Algeria every time”. Visitors mainly asked for banks to be there; the organiser spoke of completing the chain of trust between developers and buyers. Financing is a matter for the banks. But part of that trust is the developer’s own job: showing, every month, from Paris, that the site is moving and that the money paid matches what has been built.
An off-plan sale at a distance, in six moments
The system has to hold each of these six moments. The first three play out over a few weeks; the last three last for years.
The contact is recorded with what is needed to call back: budget, wilaya, unit type, planned financing, date of the next trip. Remote viewing is a live video call on a Saturday, with the unit plans, the view from the floor and samples of finishes; Algeria is on the same time as France in winter and one hour behind in summer, which makes appointments easier. Reservation holds the unit and prepares the file, so that the signature at the notary fits into the next trip.
Progress is shown in dated photos at each stage, taken from the same points every month, so the buyer can compare at a glance. Payments follow the schedule written in the contract: each call for funds is announced, paid, receipted and visible. Handover, finally, is prepared: a date confirmed early enough to book leave, snags recorded in photos and tracked until they are fixed, keys handed to the buyer or to a relative they have named.
«What sells the next unit is the buyer who never had to get on a plane.»
What to build: the site log first
The temptation is to start with the buyer portal, since that is what you show at the fair. But the portal only shows what the site gives it.
The site log is the heart of it. For each block, about ten photo points are defined once and for all: north façade, stairwell, one sample flat per floor. Every month the site manager opens the app, which guides them point by point; each photo carries its date, position and construction stage. They approve, a manager reviews, and the update goes out to the portal of that block’s buyers. Ten minutes per block per month: that is the condition for the log to last three years, and the question to ask before any other feature.
Contacts and follow-up come right after, because that is where the money spent on the fair is lost: one record per contact, one person responsible for calling back within 48 hours, and a dated follow-up. An AI agent can answer simple questions about a project in the evening, in Arabic and French, from its documents, and hand over to a salesperson for the rest. The foundation stays in the developer’s name: contracts, plans, photos and messages are personal data, to be protected under law 18-07.
What a well-followed fair is worth
An example on assumptions, to redo with the figures from your last fair: 400 contacts collected over three days, 20 million dinars per home.
If 3% of contacts reserve when they are called back whenever someone has time, the fair produces 12 reservations. If contacts are qualified, called back within 48 hours, invited to a remote viewing and followed up until the summer trip, and the rate rises to 6%, it produces 24: 12 more homes, about 240 million dinars in sales. We know of no public measurement of these rates; they are assumptions to show the order of magnitude, not a promise.
The check needs no software: take the list from the last fair and count how many contacts were called back within 48 hours, and how many reserved six months later. If the list is asleep in a spreadsheet or a phone, that is the first job. The same follow-up principles apply to property agency software, but the developer has one more constraint: they must keep trust alive for the whole length of the build.
«The buyer portal only shows what the site gives it.»
Six questions from a remote buyer
Every question a diaspora buyer asks comes down to six. Each one, unanswered, becomes a call, a trip or a doubt.
The two questions that cost the developer most are often the simplest. “Where are my payments?”: when the buyer cannot find their receipts, every call for funds becomes a negotiation; when the schedule, receipts and next call are visible, they pay on time. “Who answers me?”: one named contact, with a written response time, replaces the three numbers the buyer tries one after another.
Finishes deserve their own treatment. Choosing tiles or a kitchen from Paris is possible if the tool presents the options, their price and a deadline after which the default choice applies. Without a deadline the site waits; without a written price, handover turns into a dispute.
And the house built from France?
Many Algerians in France do not go through a developer: they have a house built on family land, entrusting the site to a contractor and the money to a relative. The trust mechanics are the same, and there is room here for serious building firms or follow-up platforms.
The principles do not change: a quote by trade, structural work, plumbing, electrics, joinery; payments by stage, never more than one stage ahead; dated photos from fixed points at each stage, with material invoices photographed; any extra work approved remotely before it is done, as we described for garage quotes. A firm that offers this follow-up to its diaspora clients has an argument its competitors lack; a platform that offers it across several firms can charge per site, in euros.
Which model to build
Six possible models, from the developer equipping its own projects to the platform serving several trades.
One developer and one live project are the safest starting point: the buyers already exist, so do their questions, and the effect can be measured within months in the number of calls and the punctuality of payments. A portal shared by several developers is tempting for the diaspora, who like to compare, but it puts projects of uneven quality under one brand: it needs entry rules, starting with a mandatory site log.
Rental management after handover is the natural next step for buyers who invest to let: the press cites gross yields of 5 to 9%, to be checked project by project. The same buyer who followed their site from Paris will want to follow their rents the same way; we cover remote oversight in running a business in Algeria from France.
The calendar for 2027
About twelve weeks between scoping and a trial on a live project, to be run in before summer.
November: scoping, and picking up the contacts from the October fair while they are still warm. November to January: the buyer portal with progress, documents and the schedule, then the site app, with its photo points defined block by block. February and March: the trial on a live project, with its real buyers; their questions in the first six weeks show what needs fixing.
March to May: remote viewing and the choice of finishes. Summer, when the diaspora comes on holiday, is the time for site visits and signatures; October, the Paris fair, is the time for new contacts, with one more argument: showing a real buyer’s portal on the stand, with their consent. These durations are consistent with those we set out in how long it takes to build an app or platform.
What makes this kind of project fail
- Starting with the shop window. A beautiful buyer portal with no site log is empty after three months.
- Photos with no method. Pictures taken at random cannot be compared; the same points are needed every month.
- A log too heavy for the site. If it takes more than ten minutes per block, the site manager stops.
- Fair contacts left asleep. Without a call back within 48 hours, the fair cost the stand and the trip for nothing.
- Finishes with no deadline or written price. The site waits, or handover turns into a dispute.
- A hidden delay. A delay announced with its reason is forgiven more easily than one discovered; the tool must make it easy to write.
- Accounts in the developer’s name. Server, domain, data, photos and contracts in the property developer’s name from the first week.
Frequently asked questions
- Can a buyer living in France follow the progress of a site in Algeria without travelling?
- Yes, if the developer publishes a site log: dated photos taken every month from the same points, by stage, in a space for each buyer, with the schedule and receipts. A live video visit complements the photos. Travelling is still useful for signing and for handover.
- Are off-plan payments tied to construction progress?
- The schedule is set by the off-plan sale contract and follows construction stages; have it checked by your notary. The tool’s role is not to set those rules but to show the buyer, for each call for funds, the stage reached, the photo that proves it and the receipt for their payment.
- How much time does the site manager spend on it?
- The aim is about ten minutes per block per month: the app guides them from point to point, each photo is dated and tied to its stage, and a manager reviews before publication. Beyond that, the log will not last three years.
- Do buyers need a mobile app?
- Not at first. A web portal in Arabic and French, with a notification at each update, is enough. The app comes if buyers return often, for example to choose finishes or follow handover; we cover those choices in building a mobile app in 2027.
- Can a contractor building houses for the diaspora use the same tool?
- Yes: quotes by trade, payments by stage, dated photos from fixed points, material invoices photographed and extra work approved remotely. It is the same trust mechanism, at the scale of one house.
- How long does it take to be ready?
- About twelve weeks between scoping and a trial on a live project, with contacts, the buyer portal and the site app. Remote viewing and finishes follow over two to three months, to be run in before summer and the October fair.