New-Build Mortgage Case Study: Buying Off-Plan

by | Thursday 16th Jul 2026 | Mortgage News

Buyer viewing a new-build property while arranging a mortgage before completion.

Client details have been anonymised to protect their privacy.

Buying a new-build home can be exciting, but it also comes with challenges that buyers of existing properties don’t usually face. One of the biggest is timing. Many new-build homes are reserved months before they’re ready to move into, meaning buyers need a mortgage that can keep pace with the construction schedule. In this case study, we helped a client secure a mortgage for a new-build property before construction had been completed, ensuring they were in a strong position when the property was finally ready to hand over.

Quick Answer

Yes, it is possible to secure a mortgage on a new-build property before it’s completed. However, buying a new-build home often requires careful planning because mortgage offers are only valid for a limited period, while construction schedules can sometimes change. Choosing the right lender and carefully managing the mortgage application timeline can make the difference between a smooth completion and unnecessary delays.

Quick Summary

  • Client reserved a new-build home
  • Property would not be completed for several months
  • Mortgage application submitted before completion
  • Lender selected with suitable new-build criteria
  • Purchase completed successfully when the property was ready

Unlike many existing properties, new-build homes are often purchased “off-plan”, meaning buyers commit to the purchase before construction has finished. This makes careful mortgage planning particularly important, as completion dates can sometimes change during the build process.

Who This Case Study May Help

This case study may be relevant if you:

  • Are buying a new-build property
  • Have reserved an off-plan home
  • Are concerned your mortgage offer could expire
  • Are buying through a developer
  • Want to understand how new-build mortgages work
  • Need advice before exchanging contracts

The Situation

Our client had reserved a brand-new home on a residential development in the South East. The property was still under construction, with completion expected several months later. Like many new-build buyers, they were excited to secure the property but were unsure when to begin the mortgage process. Like many buyers, they were also keen to lock in a competitive mortgage rate before market conditions changed.

The Challenge

New-build purchases often involve longer timescales than existing homes.

The key challenges included:

  • Construction completion dates can change.
  • Mortgage offers have expiry dates.
  • Developers often work to strict exchange deadlines.
  • Buyers need confidence that funding will still be available when the property is finished.

Our role was to manage the mortgage process carefully, ensuring the client could exchange contracts with confidence while reducing the risk of complications if the build timetable changed.

What We Did

We worked closely with the client from the moment they reserved the property. We also considered the expected completion date to ensure the chosen lender’s mortgage offer was appropriate for the anticipated build schedule.

Throughout the transaction we:

  • Reviewed affordability.
  • Recommended the most suitable mortgage product.
  • Submitted the application promptly.
  • Worked closely with the lender.
  • Liaised with the solicitor where required.
  • Monitored the build timeline throughout the transaction.

As construction progressed, we remained in regular contact with the client to ensure everything stayed on track ahead of completion.

The Result

The client’s mortgage offer was successfully secured, and the purchase completed when the developer confirmed the property was ready.

Key outcomes included:

  • Mortgage approved before construction finished.
  • Purchase completed successfully.
  • No unnecessary delays.
  • Confidence throughout the buying process.
  • Smooth coordination between all parties.

By planning ahead and selecting the right lender from the outset, the client was able to move into their brand-new home with confidence and without unnecessary delays or additional stress.

Why Timing Matters When Buying a New-Build Home

Buying a new-build property is often very different from buying an existing home. Construction programmes can change, developers usually work to fixed exchange deadlines, and mortgage offers don’t last indefinitely.

Planning your mortgage application correctly can help reduce uncertainty and avoid unnecessary pressure later in the transaction. Working with a mortgage adviser who understands new-build purchases can make the process significantly smoother.

Some lenders have more flexible policies for new-build purchases than others, including longer mortgage offer validity periods or the ability to consider offer extensions where appropriate. Understanding these differences before submitting an application can be invaluable.

Oportfolio Insight

Across London and the South East, we’re helping more buyers purchase new-build homes than ever before. One of the biggest misconceptions is that once you’ve received a mortgage offer, the hard work is over.

Actually, new-build purchases often require ongoing monitoring, particularly where construction timelines change or completion dates move. Choosing the right lender from the outset can provide valuable flexibility and help keep your purchase on track if circumstances change.

Key Takeaways

  • You can secure a mortgage before a new-build home is completed.
  • Timing is an important part of the new-build buying process.
  • Mortgage offers are only valid for a limited period.
  • Choosing a lender experienced in new-build lending can be beneficial.
  • Professional mortgage advice can help reduce delays and uncertainty.

Common Mistakes New-Build Buyers Make

When buying a new-build property, some of the most common mistakes include:

  • Waiting too long before seeking mortgage advice.
  • Assuming every lender treats new-build purchases the same way.
  • Not considering mortgage offer expiry dates.
  • Focusing only on the interest rate rather than lender flexibility.
  • Underestimating how long construction can take.
  • Exchanging contracts before fully understanding the mortgage timescales.

Planning ahead can often make the buying process much less stressful.

Need Advice On A New-Build Mortgage?

If you’re buying a new-build home or reserving an off-plan property, we’d be delighted to help. At Oportfolio Mortgages, we regularly help buyers navigate the unique challenges of new-build purchases, from selecting the right lender to managing mortgage timelines and keeping transactions on track.

Whether you’re buying your first new-build home, purchasing off-plan or moving into your next property, we’ll guide you through every stage of the mortgage process and help you find a lender that’s well suited to your circumstances.

Get in touch with Oportfolio Mortgages today and let us help you move into your new home with confidence.

Did you find this article helpful? Add Oportfolio as a preferred source in Google and our latest mortgage insights are more likely to find their way to you.

We're Here to Help

If you have any questions about UK mortgage news or or anything you’ve read then please get in touch. We’d love to hear from you.

As featured in

Talk To A Mortgage Expert

Fill in your details and we'll get in touch as soon as possible!