Article

Marc Andre Siebenborn
7 min. reading time

Article

Marc Andre Siebenborn
7 min. reading time
Most renovation projects that go wrong do not fail because of bad luck. They fail because the project manager was reactive rather than proactive, vague rather than precise, and focused on finishing the job rather than delivering the client's actual goal.
The best property project managers in Spain operate differently from the start, and the differences are specific and measurable. This article covers the 7 things that consistently separate the best from the rest.
The best managers define the client's goal before they discuss budget
Fixed pricing from day one removes any incentive to inflate costs
In-house legal and licensing prevents problems that only appear years later
Builder selection is a process
Proactive communication means clients never need to chase for an update
A 10% buffer on time and budget is standard practice
The best managers have invested their own capital in property development
The first conversation a good project manager has is not about cost. It is about what the client is trying to achieve with the property.
Is it a resale flip, a holiday let, or a personal home?
The end goal determines every decision that follows, materials, layout, finish level
A resale project prioritises ROI over personal taste
A holiday let prioritises functionality, durability, and rental appeal
A personal home prioritises the client's specific preferences
Getting this wrong at the start is one of the most common and costly mistakes. A property renovated with the wrong objective in mind is harder to sell, harder to let, and rarely delivers the return the owner was hoping for. At Helios Homes, every project begins with a site meeting where this question is the only agenda item before any numbers are discussed.
A fixed quotation is not just a number. It is a statement about whose interests are aligned.
The agreed price is set before work begins, not estimated and adjusted later
This includes the project management fee, which is also locked in from day one
No incentive exists to make the build more expensive once the price is agreed
Change orders are documented and approved before any extra work proceeds
Budget certainty is especially critical for clients managing a project remotely
We have seen clients come to us after working with project managers whose fees were tied to total build cost, creating an obvious incentive to let costs grow. At Helios Homes the quotation and our fee are both closed at the tender stage. Once agreed, neither changes.
Licensing mistakes are one of the most overlooked risks in Spanish renovation projects, and one of the most serious when they surface.
Builders sometimes apply for the wrong licence or leave out key details
A minor works licence and a major works licence have very different implications
Licensing errors can create legal problems for the owner years after the renovation
An in-house architect ensures every application is complete and correctly filed
Structural changes, footprint extensions, and new builds each require different processes
The problem with outsourcing this step is that the person filing the paperwork has no ongoing accountability if something is wrong. At Helios Homes our in-house architect manages every licence application directly, from minor cosmetic works through to full structural renovations and extensions.
The builder is usually the single biggest variable in whether a renovation goes to plan or not.
A transparent tender process compares at least 2 to 3 builder quotes per project
Builders are selected on track record and fit, not just on price
Clients can put forward their own preferred builders to be included in the tender
Watertight contracts are in place before a single wall comes down
The right project manager has worked with multiple building companies over many years
Over 12+ years and 37 completed projects as both developers and client project managers, we have built relationships with a range of verified building companies across the Costa del Sol. That history means we know which builders perform consistently and which ones do not before a project starts, not after.
The clearest sign of a weak project manager is a client who has to chase for updates.
Clients in Spain receive bi-weekly site meetings throughout the project
Clients abroad receive weekly written status reports and on-site videos
Updates cover completed work, upcoming decisions, and any issues that have arisen
Direct access to the project manager is available throughout, not just at milestones
Communication style is adapted to the client, not to what is convenient for the team
International clients in particular are buying trust as much as they are buying a service. They cannot be on-site every week, so the quality of communication is directly proportional to their peace of mind. A client who has to ask what is happening has already been let down.
Unforeseen issues are not a sign that something has gone wrong. They are a normal part of property development in Spain.
Always allow a 10% buffer on budget for unexpected costs
Always allow a 10% buffer on time for unexpected delays
Apartments of 2 to 4 bedrooms typically take 6 to 7 months including furnishing
Houses of 3 to 5 bedrooms typically take 9 to 10 months for a full renovation
Larger villas and mansions of 6 or more bedrooms can take up to 12 months
The worst outcomes we see come from projects where the timeline was set at the most optimistic possible figure to satisfy the client, and the budget had no room to absorb anything unexpected. Builders who promise magical timelines are not being helpful. They are creating a problem that surfaces halfway through the project when it is too late to plan around it.
The difference between a project manager who has invested their own capital and one who has not is significant, and it shows in every decision they make.
25 development projects completed independently as developers before taking client work
Over 12 client projects managed in recent years, from Sotogrande to Málaga
Projects range from small 2-bedroom apartments to large multi-bedroom villas
Personal experience of being on a timeline, on a budget, and needing a return
Understanding what it actually feels like to have capital at risk on a renovation
Marc and Jean-Pierre Siebenborn developed properties with their own capital long before Helios Homes managed projects for clients. That experience changes how every decision is made. When you know what it feels like to watch your own budget, you treat the client's budget with exactly the same care.
The best property project managers in Spain do not just coordinate tradespeople. They define the goal, lock in the price, handle the legal process, select the right builder, communicate proactively, plan for the unexpected, and bring real personal experience to every decision they make. These are not small differences. They are the difference between a renovation that delivers a return and one that costs more and takes longer than anyone planned.

Marc Andre Siebenborn
Marc Andre is a Partner and COO at Helios Homes. He holds a business degree from King's College London and has been developing properties in Marbella since 2014. He is fluent in German, English, and Spanish, and oversees renovation and project management for Helios Homes clients across the UK, Germany, Scandinavia, and the US.
What does a property project manager in Spain actually do?
How do I know if a project manager in Spain is trustworthy?
Do I need a project manager if I already have a builder in Spain?
How long does a renovation project take in Marbella?
What is a fair project management fee for a renovation in Spain?