Bengaluru ASI Heritage Sites – AMASR Zone and Buffer Rules
ASI

Overview
Bengaluru has two ASI-protected monuments directly within its urban core, the Bangalore Fort (Tipu’s Fort) and Tipu Sultan's Palace, plus several more in the wider Bengaluru region: Devanahalli Fort and Tipu Sultan’s Birth Place at Devanahalli, the prehistoric site at Chikajala, the Managondanahalli prehistoric site (all Bangalore Rural district), and the Hejjala prehistoric site (Ramanagara district, carved from Bangalore Rural in August 2007). Any plot within 300 metres of these centrally protected monuments falls under the Ancient Monuments and Archaeological Sites and Remains (AMASR) Act, 1958. The act creates two hard zones: a prohibited area (0-100 m) where no construction is permitted, and a regulated area (100-300 m) where construction requires National Monuments Authority (NMA) / Competent Authority clearance. This layer maps every ASI-designated heritage site across the Bengaluru region.
Bengaluru heritage site restrictions that will kill your building plan
Most brokers selling plots near Bengaluru's forts, temples, and archaeological sites will not mention the ASI buffer rules, because most brokers do not know them.
The AMASR Act is absolute. Within 100 metres of any centrally protected monument, no construction of any kind is permitted. Not residential, not commercial, not a boundary wall. Beyond that, from 100 to 300 metres, every construction requires approval from the National Monuments Authority (NMA) via the Competent Authority. This is the regulated area. Repair of an existing structure in the prohibited zone requires separate permission from the National Monuments Authority (NMA).
ASI Monument Buffer Zone Rules in Bengaluru
The table below shows the key zone rules applicable to any plot near an ASI monument in Bengaluru.
Prohibited
Distance from Monument
0-100 m
Construction Rule
No construction permitted
Authority for Permission
Not applicable, prohibited
Regulated
Distance from Monument
100-300 m
Construction Rule
Permitted only with NMA approval
Authority for Permission
National Monuments Authority (NMA) / Competent Authority
Height restriction zone
Distance from Monument
Up to 500 m
Construction Rule
Height restrictions apply
Authority for Permission
BDA / local planning authority
Zone
Distance from Monument
Construction Rule
Authority for Permission
Prohibited
0-100 m
No construction permitted
Not applicable, prohibited
Regulated
100-300 m
Permitted only with NMA approval
National Monuments Authority (NMA) / Competent Authority
Height restriction zone
Up to 500 m
Height restrictions apply
BDA / local planning authority
One more rule most buyers miss: any plot within 500 metres of an ASI-designated monument in Bengaluru is subject to height restrictions per BDA's buildability rules referenced in the Bengaluru Building Bye-Laws (Section 20A, AMASR Act, 1958), even if it sits fully outside the regulated area. If a broker cannot show you the ASI monument boundary and the survey number's distance from it, stop the conversation there.
A second risk specific to Bengaluru: the city has over 3,000 informal/unauthorised layouts: BDA jurisdiction has 172 unauthorised layouts on 3,109 acres, BMRDA jurisdiction has approximately 1,500, plus more in Hoskote, Anekal, Nelamangala, STRR, and BIAAPA areas (BDA notification + The Hans India, Sep 2024). Revenue sites near Devanahalli Fort and the Chikajala prehistoric site are especially common because brokers market them at a discount precisely because they cannot get BDA or BMRDA approval. A B-Khata address near a protected monument almost certainly signals a layout that has bypassed both the planning authority and the ASI buffer check.
Investment corridors where heritage meets growth: Devanahalli, IVC Road and North Bengaluru
Not every plot near a Bengaluru heritage site is a risk. Many of the city's strongest appreciation corridors run directly through heritage-rich North Bengaluru, and understanding the buffer rules helps you identify which plots inside those corridors are actually buildable.
Devanahalli is the clearest example. The ASI-protected Devanahalli Fort and Tipu Sultan's birthplace site sit within the town, but most of the high-growth residential layouts are laid out along IVC Road, NH-44, and the Satellite Town Ring Road (STRR), all well beyond the 500-metre height restriction zone. Plots in this corridor have appreciated from roughly ₹2,800 per sq ft in 2022 to around ₹3,900 per sq ft by 2025, with the Kempegowda International Airport, Aerospace SEZ, and Devanahalli Business Park driving demand.
The table below maps the key corridors in North Bengaluru relative to heritage proximity and growth status.
IVC Road / Devanahalli town
Key Heritage Site Nearby
Devanahalli Fort (ASI)
Distance from ASI Monument
Varies, check survey no.
Growth Driver
Airport, STRR, Aerospace SEZ
Risk Level
Low-medium (confirm buffer)
Chikkaballapur Road
Key Heritage Site Nearby
Chikajala prehistoric site (ASI)
Distance from ASI Monument
Varies, check survey no.
Growth Driver
NH-44 connectivity, airport corridor
Risk Level
Medium (revenue site risk high here)
Yelahanka-Hebbal
Key Heritage Site Nearby
Nil centrally protected in immediate zone
Distance from ASI Monument
N/A
Growth Driver
Outer Ring Road, metro, IT parks
Risk Level
Low
Central Bengaluru
Key Heritage Site Nearby
Tipu Sultan's Palace, Bangalore Fort (Tipu’s Fort)
Distance from ASI Monument
Urban core, dense proximity risk
Growth Driver
Mature city zone, no growth play
Risk Level
High (buildability severely constrained)
Corridor
Key Heritage Site Nearby
Distance from ASI Monument
Growth Driver
Risk Level
IVC Road / Devanahalli town
Devanahalli Fort (ASI)
Varies, check survey no.
Airport, STRR, Aerospace SEZ
Low-medium (confirm buffer)
Chikkaballapur Road
Chikajala prehistoric site (ASI)
Varies, check survey no.
NH-44 connectivity, airport corridor
Medium (revenue site risk high here)
Yelahanka-Hebbal
Nil centrally protected in immediate zone
N/A
Outer Ring Road, metro, IT parks
Low
Central Bengaluru
Tipu Sultan's Palace, Bangalore Fort (Tipu’s Fort)
Urban core, dense proximity risk
Mature city zone, no growth play
High (buildability severely constrained)
The most misread corridor is Chikkaballapur Road north of the city. Multiple revenue site layouts are sold here with no disclosure that the ASI's prehistoric site at Chikajala sits within or near their boundary. Demand in this belt is real, but every plot must be cross-checked against the ASI monument boundary before any purchase decision.
Frequently Asked Questions
Can I build anything on a plot within 100 metres of an ASI-protected monument in Bengaluru?
No. The prohibited area extends 100 metres from the protected limit of any centrally protected monument. No construction of any kind is permitted in this zone, including boundary walls. The 100 m is measured from the notified protected limit of the monument as declared under the AMASR Act — not from the visible outer wall, fence, or perimeter of the site as it appears on the ground. The 100 m is measured from the notified protected limit of the monument as declared under the AMASR Act — not from the visible outer wall, fence, or perimeter of the site as it appears on the ground.
What rules apply in the regulated area, 100 to 300 metres from the monument?
Construction in the regulated area (100–300 m) requires prior approval from the National Monuments Authority (NMA), routed through the Competent Authority (CA) — typically the State Director of Archaeology. Applications must be submitted to the CA, who forwards them to NMA within 15 days; NMA decides within two months. The approval requirement applies to all new construction, reconstruction, and repairs. Applications go through NMA’s NOAPS portal at nma.gov.in (mandatory since 1 July 2025 under the AMASR Amendment Act 2010). No construction should begin without written NMA approval in hand.
Does proximity to a heritage site affect building height even outside the regulated zone?
Yes. Any plot within 500 metres of an ASI monument in Bengaluru is subject to height restrictions under BDA's buildability rules, even if it falls outside the 300-metre regulated area.
What is a Heritage Impact Assessment and when is it required in Bengaluru?
A Heritage Impact Assessment (HIA) documents how a proposed construction affects a monument’s setting and character. NMA may require an HIA as part of the NOC application for regulated-area projects (100–300 m), with thresholds set by monument-specific Heritage Bye-Laws and project type. The HIA is submitted to the Competent Authority (CA), who forwards it to the National Monuments Authority (NMA) for review. NMA uses the HIA to assess whether the proposed project will cause adverse impact on the monument’s heritage value before granting or refusing permission. Verify the specific requirement for each Bengaluru monument with NMA before applying.
How do I check whether my plot is inside the ASI buffer zone before buying?
What documents confirm a plot near Devanahalli Fort is legally buildable?
Confirm A-Khata status, DC conversion from agricultural to residential use, BIAAPA layout approval (Devanahalli falls under BIAAPA jurisdiction), and a written confirmation that the plot is beyond 300 metres from the boundary of every ASI monument in the vicinity (Devanahalli Fort and Tipu Sultan’s Birth Place). All four must be present.
What happens if someone has already built in the prohibited zone?
The Central Government may order the owner to demolish the structure within a specified period. If they refuse, the government can demolish it and recover the cost from the owner.
Can existing structures inside the prohibited zone be repaired or renovated?
Repairs and renovation within the prohibited area require prior permission from the National Monuments Authority (NMA). No work, including minor renovation, should begin without that written clearance.
Disclaimer
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Data Source & Verification
Source
Official Archaeological Survey of India (ASI) documents
Official Website
asi.nic.in
Coordinate Reference System
EPSG:4326 (WGS 84)
Geometry Type
Polygon / MultiPolygon
Data Format
Vector (GeoJSON) + Raster Tiles
Last Verified
April 2026
Status
Active
