Calculate Building Value on TNREGINET 2026

Understanding the correct building value is important for property registration, stamp duty calculation, and legal verification in Tamil Nadu. The TNREGINET portal offers an online calculate that helps users estimate building value based on location, building type, and construction specifications.

This allows property buyers and owners to estimate expenses more accurately and reduce the chances of disputes during the registration process.

How Building Value Differs from Land Guideline?

• Land — Per sq.m guideline rate (street/survey-based).
• Building — Plinth area rate × area × depreciation + amenities.
• Total Registration Value — Higher of (land + building) or agreed price. Unique: For apartments, building calculator estimates construction; UDS land separate.

Guide to Calculate Building Value

TNREGINET “Calculate Building Value” can be used without creating an account. It uses a simple form connected to the IGR’s updated 2025 valuation database, which includes more than 5 lakh zonal records. The tool generates an official report that can be printed and submitted to the SRO. It is free to use and usually provides results in under 30 seconds.

• Portal Access: Go to https://tnreginet.gov.in/portal/. Go down in footer click on “CALCULATE BUILDING VALUE”.

• Add Building Classification: From the first dropdown, select category:
  • Residential/ Private (A1: Pucca, A2: Semi-Pucca).
  • Commercial/ Apartments (B1: Shops, B2: Offices).
  • Others (C: Industrial, D: Institutional).

• Specify Building Type and Details:
  • Type: Sub-select (e.g., Independent House, Apartment, Factory Shed).
  • Age: Numeric entry (e.g., 8 years), auto-applies depreciation table (e.g., 2% p.a. for 0-10 years, straight-line to 60% residual at 30+ years).
  • Built-up Area: Enter sq.ft. (e.g., 1200) or sq.m. (toggle unit)—system converts seamlessly.
  • Floors: Ground + count (e.g., G+2); premium for stilt parking (+5%).

Enter Zonal and Regional Parameters:

• Zone/Region: Cascading dropdown (e.g., Chennai > Central > T. Nagar), pulls live guideline (₹4,000/sq.ft. base for 2025).
• Street/Ward: Optional text for micro-adjustments (e.g., “Anna Salai” boosts 10% for commercial).
• Calculation Period: Default “Current” (Q4 2025 rates); historical for legacy audits

• Advanced Options
  • Depreciation Adjustment: A custom depreciation rate can be applied if it is approved by a certified valuer (for example, 3% for seismic retrofit work).
  • Additional Features: Extra facilities like lifts or centralized AC can increase the value (around ₹500 per sq. ft.), while solar panel installations may qualify for an eco rebate of about 2%.
  • Multiple Units: For apartment complexes or multi-unit buildings, you can enter the total built-up area, and the system will generate a detailed value calculation for each unit.
• Validate and Submit: Review summary (e.g., “Base: ₹3,800/sq.ft. x 1200 = ₹45.6L; Deprec: -₹4.56L; Net: ₹41.04L”). Hit “Submit”, no captcha for this module. 
• Review and Export Results:
  • Depreciation Adjustment: A custom depreciation rate can be applied if it is approved by a certified valuer (for example, 3% for seismic retrofit work).
  • Additional Features: Extra facilities like lifts or centralized AC can increase the value (around ₹500 per sq. ft.), while solar panel installations may qualify for an eco rebate of about 2%.
  • Multiple Units: For apartment complexes or multi-unit buildings, you can enter the total built-up area, and the system will generate a detailed value calculation for each unit.

Input	Example	Effect on Value
Building Type	Residential (RCC)	₹3,000 – ₹5,000 per sq.ft (base rate)
Building Age	5 years	10% value reduction
Built-up Area	1500 sq.ft	Value increases based on area
Location Zone	Madurai South	8% higher value
Extra Facilities	Lift & Parking	Adds ₹7,50,000