Large-scale sustainability upgrades
without the noise

Large-scale sustainability may sound grand, even abstract, but in practice it is a manageable sequence of smart interventions that lift your portfolios step by step towards a future-proof energy performance. We show you how to organise, accelerate and safeguard that sequence—without residents or colleagues getting lost in technology or paperwork.

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Real acceleration starts here

Why wait?

Start small, roll out big—that is where the gain lies

Standardise

By standardising materials, processes and dashboards, a housing association can tackle hundreds of homes in the same rhythm. You minimise failure costs and save valuable time in procurement and execution.

Automate

Smart software collects and links data from inspections, BIM models and sensors. Thanks to that automation, decision-making takes days instead of months because all information converges in real time.

Integrate

Design, planning, execution and monitoring take place on one integrated platform. That prevents silos—think of it as a digital bridge between contractor, installer and client.

Scale up

Once the first tranche is completed, you repeat the approach in modules. Each new complex benefits from the learning curve of the previous one, allowing you to upgrade faster and more sharply.

Think of it as a train that never stops—that is the best way to picture large-scale sustainability upgrades..

While the first building is still under scaffolding, the second is already being surveyed and the third is running the financial calculations.
The power of repetition

The power of repetition.

Better, cheaper, smarter with every round

Less debate, more progress

Developing a standardised product-market combination once and for all prevents endless debates about insulation values or heat-pump types. It saves meeting time—and headaches.

Learning from data, not gut feeling

Sensor data immediately shows which measures truly deliver results. I notice many teams still steer on assumptions; with serial data feedback that is no longer necessary.

Residents as allies

In practice you often see support grow when the second or third street benefits. Residents hear enthusiastic neighbours— and they follow suit.

  • Lower failure costs through repetition

  • Shorter lead times thanks to standard procurement

  • Performance figures always up to date

  • Resident communication becomes copy-paste

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How do you navigate large-scale sustainability upgrades?.

Here is a step-by-step approach to implement serial sustainability upgrades without getting bogged down in complexity.

Step 1: Inventory

Step 1: Inventory.

A quick yet thorough baseline assessment records the construction years, installations and labels in the portfolio. You do not need every detail; 80% certainty is enough to start clustering.

Step 2: Cluster

Step 2: Cluster.

Group homes with comparable building physics. Think "1960s walk-up flat" or "1980s terraced house". This avoids bespoke overkill and lets you prepare standard solutions.

Step 3: Develop concept

Step 3: Develop concept.

For each cluster, choose a compelling combination of insulation, ventilation and generation. Sometimes you insert a sub-step: "validate concept with pilot residents". Feedback here prevents extra work later.

Step 4: Build a digital twin

Step 4: Build a digital twin.

A lightweight BIM model and live data from smart meters create a digital mirror of each cluster. This model serves as a calculator for energy savings and a planning tool for the contractor.

Step 5: Roll out & iterate

Step 5: Roll out & iterate.

The execution crew uses prefab façade and roof elements to finish each home within one working week. After completion, performance is monitored and lessons learned are fed straight back into the model.

Step 6: Finance

Step 6: Finance.

A business-case stream runs in parallel to the technology. Serial structures let you stack funding: own capital, subsidies, ESG loans. Cash flow stays healthy even when interest rates fluctuate.

A philosophical look at scale

A philosophical look at scale.

Why bigger can sometimes be more humane

Some consider scaling up impersonal. Yet large-scale sustainability upgrades are precisely about making comfort and low energy bills accessible to the masses. You could argue that scale is the democratisation of sustainability.

The ethics of repetition

Every repetition forces us to eliminate waste. In fact, serial processes make mistakes visible—and therefore easier to solve.

Time versus impact

By scaling faster, emission reduction accelerates exponentially. We remain responsible for diligence, but time pressure is no longer the enemy—rather a catalyst.

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Practical tips from the field

Practical tips from the field.

What you can apply tomorrow

Ready to pick up the pace? Start with these concrete actions.

Create a template framework agreement

  • Record materials, prices and quality criteria

  • Add a dynamic price matrix for indexation

  • Use open standards so multiple partners can sign on

Set up a single data hub

  • Centralise EP data, maintenance logs and resident feedback

  • Automate reports to subsidy portals

  • Link the hub dashboard to Power BI for visual progress

Create an error log

  • Note every failure moment—no matter how small

  • Reflect weekly with the entire chain

  • Adjust SOPs immediately, not at the end of the project

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Critical note

Critical note.

Where seriality can pinch

Let us be honest: not everything can be standardised. Listed buildings sometimes require bespoke solutions, and residents with health issues cannot simply live in the cold for a week.

Design freeze can hamper innovation

If you lock everything in too early, you miss technological leaps halfway through the programme. Flexible variant management is therefore indispensable.

Financial lock-in

Long-term contracts may feel safe but can turn unfavourable if material prices fall. Keep an exit clause up your sleeve.

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Ready for real acceleration?

Ready for real acceleration?

Let us spar about your portfolio—no strings attached—because the first step is often a good conversation. No sales pitch, just a joint look at how serial sustainability upgrades can bring your goals closer.

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Hans Lugtenberg

"A deal is a deal"

Yield.inc is a new asset manager in the Netherlands that focuses on excellent customer experience, sustainability and technology. When faced with the question of whether to develop our platform in-house or with a partner, we got in touch with Spartner. We are still 100% behind the choice for Spartner because we own the source code and with Spartner, a deal really is a deal, whether it concerns the delivery date or the agreed budget!

Hans Lugtenberg Partner at Yield Inc.

Norbert Wegter

"A professional software partner since 2010"

Spartner is involved and contributes in our search for innovations and always delivers top-notch work. After the first Huurda.nl version got out-dated, we collaboratively launched a completely new version in 2020.

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Norbert Wegter Owner of 123wonen and Expat Homes Holland

"Doijer & Kalff"

After transferring our D&K portal to Spartner, we have elevated the further development and continuity to a higher level. Although the D&K platform was originally developed internally, our technical expert can now focus on other innovations within Doijer & Kalff. Spartner provides the quality we need without excessive costs. They have seamlessly taken over the care of our portal, allowing us to benefit from a flexible capacity that perfectly aligns with our future plans and innovation goals.

Reinier van Bergen Managing Director at Doijer & Kalff

Jurjen Terpstra

"Pragmatic and flexible collaboration"

Spartner has created a customized portal for us for the accountability of large-scale collaborative projects. This enables us and our partners to execute and account for their plans in a shared environment that is secure, transparent, and manageable. The pragmatic and flexible collaboration with Spartner has ensured that we have quickly achieved a functional and user-friendly environment.

Jurjen Terpstra Managing Partner at Wecreate Consulting

Marco Caspers

"AI and machine learning as legal tools"

In 2020, we transferred the development of Lynn to Spartner. As a result of their fast development process, the Lynn platform achieves an increasingly central role in the legal world.

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Marco Caspers Software Development Manager at Lynn Legal

Bjorn Gubbels

"As a business you must dare to move forward"

Innovation and change are not always welcomed with equal enthusiasm by our employees, man is a creature of habit but as a company you have to dare to move forward and the need for a contemporary drawing program for the realization of various constructions with our Masterbloc bricks was high. For us but also for Spartner, this challenge was a bit of pioneering and together we had to overcome some hurdles to arrive at a beautiful and efficient business tool. A development and learning process for both parties, in which the feedback of questions and desired adjustments by our employees to Spartner was always in good consultation and we could count on quick feedback and targeted solutions. We continue to exchange experiences with Spartner and look back and forward to a successful collaboration.

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Bjorn Gubbels Owner of Masterbloc

Marco Leenders

"Spartner extends our capabilities and development capacity"

With weekly calls, using our Azure DevOps sprint system, Spartner actively works together with our innovation, communication and software development departments.

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Marco Leenders Head of Automation

Gemeente Groningen

"Flexible collaboration with yearly updates"

The projectteam of the city of Groningen is very enthusiastic about the "Roomfinder" platform.

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Gemeente Groningen Projectteam

Josh Mountain

"Have been using Laravel Excel for years"

We requested custom help to a performance challenge we had in our implementation of Laravel Excel. I was amazed how quickly these Laravel artisans achieved significant performance gains, which saved us a lot of development time.

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Josh Mountain Co-Founder at IncentivePilot.com

Maurice Evers

"Higher occupancy rate thanks to our user-friendly platform"

Throughout the great years that we cooperate with Spartner (previously Maatwebsite, Ed.), our software has been developed continuously. Students and landlords actively work with features like allocation, payments, chat, contract generation and more.

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Maurice Evers Head of Student Housing Department

Maarten Bremer

"Innovating in the digital identification network of The Netherlands and Europe"

The pro-active approach of Spartner was crucial in understanding the complexity of the eHerkenning network.

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Maarten Bremer CTO / Founder Ensured

Niels Winters

"Innovation in legal technology"

As jurists with knowledge of IT, we highly value quality; within code, but also in process. The high work-level and trustworthiness of Spartner gives us the capacity to continuously create innovative features.

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Niels Winters Managing Director JuriBlox

Frequently asked questions

Practical answers to the questions we hear most often.

What exactly do you mean by large-scale sustainability upgrades? 🤔

We mean making housing clusters or commercial buildings more sustainable in a repeatable, standardised way. Think of one blueprint that you apply time and again, while data continuously fine-tunes the process.

Isn't it cheaper to do bespoke work for each building?

Bespoke work may look attractive in the short term. Yet economies of scale in purchasing, planning and the learning curve usually make serial programmes cheaper and faster over the full cycle.

What about resident disruption? 😬

Through prefabrication and tight logistics we limit the intervention to a few days. Communication starts weeks in advance; residents know exactly when each team will arrive.

Can you guarantee that the energy labels will really improve?

Guarantee is a big word, but by linking energy simulations to real-time sensor data in advance we achieve very accurate predictions. If reality deviates, we adjust immediately.

Which subsidies are available? 💶

That varies each quarter. Popular schemes include SEEH and SCE, and regional funds also play a role. Our financial advisers maintain an up-to-date subsidy sheet so you do not miss out.

How long does the preparation stage usually take?

There is no one-size-fits-all. A small portfolio can be ready for roll-out within two months, while larger associations may need six months to get all internal lights to green.

Are large-scale sustainability upgrades only interesting for housing associations? 🏢

Certainly not. Care institutions, municipal real estate and even homeowners' associations can benefit, as long as there is enough uniform stock to create scale.

What if new legislation derails the approach?

Working modularly makes upgrades relatively easy. An extra PV panel, a more sustainable heat pump—the base remains, you swap the modules. That keeps the programme future-proof.

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Feel like a cup of coffee?

Whether you have a new idea or an existing system that needs attention?

We are happy to have a conversation with you.

Call, email, or message us on WhatsApp.

Bart Schreurs
Business Development Manager
06 54671577 bart@spartner.nl
Bart Schreurs

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