Property Valuation After Renovation: How to Prepare

TL;DR: how do you prepare for a property valuation after renovation?

A property valuation after renovation starts with the purpose of the assignment. Is the report for a mortgage, a construction deposit, refinancing, sale, letting or another valuation question? The report recipient decides which report format, valuation date and documents are needed.

If you are assessing work on a home, compare its own before-and-after evidence with local context such as property valuation in Beste Taxateur Inwest, Amsterdam.

When you compare proposals, include property valuation costs in the total so extra work does not come as a surprise.

As you prepare for a valuation, gather documents needed for a property valuation before the inspection takes place.

Then make clear which work is complete and which work is still planned. Gather drawings, budgets, invoices, photographs, permit information, floor-area details and property documents. Ask the valuer how the renovation will be recorded in the assignment.

When you compare proposals, include property valuation costs in the total so extra work does not come as a surprise.

The NRVT guidance on assignment terms lists the client, property, purpose, value basis, valuation date, information sources, fee and conflicts of interest among the subjects recorded before the work starts.

When a loan uses the Dutch National Mortgage Guarantee, usually called NHG, extra rules apply when the market value after quality improvements or energy-saving measures is needed. The NHG Conditions and standards 2026-1 call for a physical valuation in that situation. The report must then show the market value at the valuation date, the adjustments and the market value after the adjustments. Always check the current requirements of your lender.

The Dutch government directs people carrying out building, renovation or demolition work to the permit check in the Omgevingsloket.

Before you book an inspection, ask the lender which valuation report the lender accepts fits your application.

What will you learn here?

• When do you need a valuation after renovation?
• Step 1: record the purpose and status of the renovation
• Step 2: ask the report recipient for its requirements
• Step 3: build a document file with evidence
• Step 4: check permits and property rights
• Step 5: record the assignment in writing
• Step 6: prepare for the inspection
• Step 7: check the valuation report
• Common mistakes
• Frequently asked questions

When do you need a valuation after renovation?

A new valuation can matter when a home has been changed or when you need a value after planned work. The purpose shapes the assignment.

If you still have a question about this topic, send it to Beste Taxateur with the point that needs clarification.

The NRVT guidance on property inspection describes a visit by the valuer.

You are financing work with a mortgage or construction deposit

Ask the lender or mortgage adviser which value is needed: the value before renovation, the value after completion, or both. Check whether the loan uses a construction deposit, an improvement budget or an energy-saving budget.

If your deadline is fixed, allow for property valuation timing before you book the inspection.

If you need a mortgage report, match mortgage valuation to the lender’s requirements before you book an inspection. A provider may quote a fee or report format, while the lender decides what will be accepted in your application.

The renovation is already complete

For completed work, the assignment concerns the home as it exists on the inspection date. Photographs, invoices, drawings and information about the work help the valuer describe the property and improvements accurately.

Before you compare fees, ask each provider about property valuer selection for your property and report recipient.

You are refinancing or increasing the loan

Ask whether a new valuation is required and which value basis applies. A lender may set its own requirements for report age, report model, validation and the way an improvement is recorded.

Before you rely on the result, compare the valuation report contents with the question the assignment had to answer.

You are selling, letting or dividing a property

A valuation for sale planning, letting, inheritance or division of assets has its own purpose. Give the valuer and report recipient a clear description of the question. Before you request a report, define valuation purposes by the decision the report must support.

Step 1: record the purpose and status of the renovation

Describe the assignment in plain language before contacting providers. Write down:

• why you need the value;
• who will receive the report;
• which part of the renovation is complete;
• which part still needs to be done;
• which valuation date matters;
• whether a mortgage, construction deposit or other finance is involved;
• which property features matter, such as leasehold, an owners’ association, an extension or a subdivided plot.

Use clear wording. “Home value after renovation” needs more detail than “the lender needs the market value after completion for a loan increase”.

When the report arrives, compare its purpose, date and evidence with reading a valuation report.

Complete, in progress or planned?

Make a short status list. Add the current state, planned state, cost and available evidence for each part.

An energy-efficient home valuation helps separate the current label, installed measures, planned work and actual performance before you rely on an expected value effect.

Complete

The work has been carried out. Keep invoices, photographs, drawings and information about installations and materials.

In progress

Describe what is finished and what remains. Schedule the inspection when the relevant parts can be seen.

Planned

Add drawings, quotations, budgets and a description of the intended work.

Cancelled or changed

Tell the valuer and report recipient when an item has been postponed, changed or removed from the plan.

Planned work has a different status from completed work. The valuer needs to see which assumptions belong to the value assessment.

Before you rely on the result, compare the valuation report contents with the question the assignment had to answer.

Step 2: ask the report recipient for its requirements

Ask these questions before confirming an assignment:

1. Which report format is accepted?
2. Is a validated report required?
3. Is a physical valuation required?
4. Must the report show the value before and after renovation?
5. Which costs and improvements need to be included?
6. How old may the report be when the lender makes its offer?
7. Which documents must be available before the inspection?

What NHG says about value after home improvements

The NHG Conditions and standards 2026-1 call for a physical valuation when the market value after quality improvements or energy-saving measures needs to be determined. A hybrid valuation is not enough for that situation under these conditions.

The same chapter says that, when the value after adjustments is needed for an NHG loan, the report must show the market value at the valuation date, an overview of the adjustments and the market value after the adjustments. The NHG explanation of a regular renovation says that renovation costs must be apparent from the report, except when the value before renovation is already enough for the requested mortgage.

These rules apply in the NHG context. For a mortgage without NHG, ask the lender or adviser which conditions apply.

If you need a mortgage report, match mortgage valuation to the lender’s requirements before you book an inspection.

Step 3: build a document file with evidence

A well-organised file makes the assignment easier to check. Include documents that relate to your home and the work.

If your renovation may need permission, confirm the permit requirements for the renovation before you finalise the valuation scope.

Plans and drawings

Floor plans, building drawings, structural drawings and a short description of the work.

Quotations and budget

Quotations, an itemised budget and the contractor or tradesperson carrying out the work.

Invoices and payment records

Invoices and evidence of completed work when the renovation has already finished.

Photographs

Photographs of the starting condition, work in progress and final result. Record where and when each photograph was taken.

Floor areas and installations

Information about added living space, layout, insulation, heating, ventilation, solar panels and other installations.

Property rights and permissions

Leasehold, owners’ association, right of superficies, permission for the work and any related conditions.

Make costs easy to follow

List costs by item. Include materials, labour, design, permits, installations and finishing work. Record work you carry out yourself. The report recipient may need a different cost breakdown from the contractor’s quote. Ask the valuer and lender which format they want.

Explain technical changes

An extra room, extension, dormer, changed layout, insulation package or new installation can affect the property description. Describe what changed and attach evidence. A list of product names without an explanation of the completed work is less useful than a clear description with an invoice or drawing.

Step 4: check permits and property rights

The valuer assesses the property within the assignment. You remain responsible for collecting information about the legal status of the work.

Depending on the location and project, there may be a permit requirement, notification requirement, information requirement or no application.

Check this before the inspection and keep the result, application or permit.

For an apartment, owners’ association approval, division documents and information about shared areas may matter. With leasehold or a right of superficies, the terms can affect the assignment. Include these details when requesting a quotation.

Step 5: record the assignment in writing

Compare providers on the content of the assignment. Ask about:

• the valuer’s registration and role;
• experience with your property type and work;
• the purpose and value basis;
• the inspection and information that will be used;
• fees for the report, validation, extra research or urgent delivery;
• scheduling and delivery;
• how missing documents are handled;
• any earlier involvement with the property or parties.

Check independence

For an NHG physical valuation, the report maker must be independent. NHG lists involvement in the purchase, sale, brokerage, building inspection or finance of the home as situations that can affect independence. Ask who will carry out the assignment and what role that person has had in the property.

Step 6: prepare for the inspection

The interior, location and surroundings are usually inspected.

A limited inspection must be stated clearly in the valuation report.

Before the appointment, arrange:

• access to every room, storage area, attic, basement and extension;
• visibility of the parts changed during the renovation;
• drawings, invoices, photographs and permit information within reach;
• a list of work that is still unfinished;
• an explanation of hidden installations, structures or insulation;
• information about owners’ association areas, leasehold or shared facilities.

Schedule the appointment when the relevant parts can be seen. Tell the valuer in advance if part of the home cannot be accessed.

Step 7: check the valuation report

Read the report before sending it on.

Then check these renovation points:

Property and address

Does the property, plot, layout and description of the changes match the actual home?

Purpose and date

Are the valuation purpose, value basis and valuation date recorded correctly?

Work completed

Is it clear which items are complete, planned, changed or excluded?

Value before and after

Are the required values and related adjustments included when your finance application needs them?

Reasoning

Are the property features, market information and assumptions described clearly?

Acceptance

Does the version, validation and age meet the report recipient’s requirements?

Tell the valuer about factual errors quickly and inform the report recipient when a correction is made. A valuation report is linked to its purpose and the information used for the assignment.

Four situations that need different preparation

Replacing a kitchen or bathroom

Separate finishes, installations, pipework and structural work. Add a budget and photographs. The cost alone does not show how much the market value will change. The valuer considers the effect within the property and its market.

Adding an extension, dormer or living space

Collect drawings, measurements, permit information and evidence of completion. Check that the floor areas and layout in the documents match the actual property.

Insulation and other energy improvements

Record which measure was installed, when it was completed and which evidence is available. Under NHG, the value after energy-saving measures can fall under the physical-valuation rules. Ask the lender which documents are needed.

Repairing overdue maintenance

Describe the defects being repaired and attach quotations or a building inspection report when requested. The NHG conditions list situations in which a building report is needed, such as poor maintenance, a need for further building research or direct costs above the threshold stated in the conditions.

Common mistakes

Sending only a quotation

A quotation shows the intended work. Completed work also needs invoices, photographs and information about what was actually carried out.

Describing the renovation as one total amount

A total amount says little about the separate items. Split work, materials, labour, installations and related costs.

Presenting a planned value as a completed value

Show which assumptions apply to planned work. The valuer needs to follow the status of the home and the improvements.

Assuming a permit is automatic

Check the permit tool in the Omgevingsloket. Keep the result and tell the valuer about the legal status.

Reading the mortgage conditions after booking the valuer

Ask the lender before the assignment which report format, validation and age are accepted.

Asking only about the increase in value

Ask about the value basis, valuation date, information sources, fees and report limitations. A larger investment does not automatically create the same increase in market value.

Energy work deserves its own evidence trail.

Frequently asked questions

Do I need a new valuation after every renovation?

That depends on the purpose. A new valuation may be needed for a loan increase, construction deposit, refinancing or a value after improvements. Ask the report recipient what applies to your application.

Is a WOZ value enough after renovation?

A WOZ value and a professional property valuation serve different purposes and use different valuation dates. A WOZ notice does not automatically replace the report a lender needs.

Does the valuer need to visit the home after renovation?

For NHG, a physical valuation is needed when the market value after quality improvements or energy-saving measures must be determined. Other assignments may have their own rules. Ask the lender or report recipient to confirm this before booking.

Are renovation costs always added to the home’s value?

No. Costs describe the work. Market value also depends on the property, location, quality, layout and demand. The valuer supports the value within the assignment.

What if the renovation is unfinished?

State which work is complete and which work is planned. Add drawings, budgets and contractor information. Ask whether the report recipient needs a value before and after completion.

When is a building inspection report needed?

That depends on the technical condition, purpose and lender requirements. NHG lists overdue maintenance that needs quick repair, poor building condition and a need for further investigation among the situations that can require a building report. Ask who must prepare the additional report.

Can I check the permit myself?

The outcome depends on the location and the work.

Contact the municipality or a qualified adviser if you have questions.

Your next step

Write a short assignment description, collect the renovation documents and ask the report recipient which version is needed. Then compare providers on report acceptance, independence, inspection, total cost and timing.

Beste Taxateur is an independent information guide and does not carry out property valuations, building inspections or mortgage advice. The lender, adviser and valuer decide which requirements apply to your situation.