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What Are You Allowed to Build at 166 Prospect St, Berlin, NH, 03570?

Backyard Cottage

(Detached ADU)

Probably Not Allowed
This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority

In Home Apartment

(Conversion or Addition)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 750 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. Final feasibility may depend on site-specific conditions and local interpretation.

Single Family

Probably Not Allowed
The existing home is allowed as a legally nonconforming structure. However, the lot does not meet current zoning requirements for new Single-Family construction. A variance or other zoning relief may be requested.

Multi Family

Home Addition

Probably Allowed
We estimate you can expand this property under current zoning rules. We weren't able to identify a specific size limit, but an addition may be possible horizontally, vertically, or both, depending on design and permitting.

Property facts

Streetview picture of 166 Prospect St, Berlin, NH, 03570

Zoning Jurisdiction

BERLIN

Parcel ID

000120000458000000

Property Type

Single Family

Zone

RT

Year Built

1916

Lot Size

7,840 sq ft

Gross Building Area

1,028 sq ft

Gross Floor Area

1,670 sq ft

Estimated

Living Area

1,670 sq ft

Basement Area

0 sq ft

Impervious Surface

1,028 sq ft

Estimated
13.1%of lot coverage

ADU rules for Berlin, NH

Based on public data and AI. Check with a pro. Read More

© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.

What Are You Allowed to Build at 166 Prospect St, Berlin, NH, 03570?

Backyard Cottage

(Detached ADU)

Probably Not Allowed
This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority

In Home Apartment

(Conversion or Addition)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 750 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. Final feasibility may depend on site-specific conditions and local interpretation.

Single Family

Probably Not Allowed
The existing home is allowed as a legally nonconforming structure. However, the lot does not meet current zoning requirements for new Single-Family construction. A variance or other zoning relief may be requested.

Multi Family

Home Addition

Probably Allowed
We estimate you can expand this property under current zoning rules. We weren't able to identify a specific size limit, but an addition may be possible horizontally, vertically, or both, depending on design and permitting.

Property facts

Streetview picture of 166 Prospect St, Berlin, NH, 03570

Zoning Jurisdiction

BERLIN

Parcel ID

000120000458000000

Property Type

Single Family

Zone

RT

Year Built

1916

Lot Size

7,840 sq ft

Gross Building Area

1,028 sq ft

Gross Floor Area

1,670 sq ft

Estimated

Living Area

1,670 sq ft

Basement Area

0 sq ft

Impervious Surface

1,028 sq ft

Estimated
13.1%of lot coverage

ADU rules for Berlin, NH

Based on public data and AI. Check with a pro. Read More

© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.